Architectural Planning Guidelines

Electrical equipment is an essential part of every modern building, but its location should never be treated as an afterthought. Transformers, substations, generators, switchboards, distribution boards, electrical risers, UPS systems, meters and other equipment require carefully planned spaces for operation, ventilation, safety, maintenance and future replacement.

For architects, the challenge is not simply to “fit” electrical equipment into the building. The equipment must be integrated with the architectural plan, structural system, fire-safety strategy, MEP services, circulation and maintenance requirements.

In India, electrical installation planning is addressed through the National Building Code of India (NBC 2016), the National Electrical Code of India 2023 (NEC 2023), relevant Indian Standards and Central Electricity Authority (CEA) regulations. The applicable local authority, electricity distribution licensee and project-specific requirements must also be checked before finalizing the design. [1][2][3]

Quick Answer: Where Should Electrical Equipment Be Located?

Electrical equipment should generally be located in dedicated, accessible and adequately ventilated service spaces where it can be safely operated, inspected, maintained and replaced without disturbing normal building activities.

The exact location depends on the equipment and project. As a general architectural principle:

substations and transformers should be positioned according to the applicable electrical, fire-safety and utility requirements;
switchrooms should be close to the electrical load centre where practical;
electrical risers should provide efficient vertical distribution;
DG sets require appropriate ventilation, exhaust, acoustic treatment and fuel-management provisions;
electrical rooms should have suitable maintenance and equipment-movement access;
electrical equipment should be protected from water ingress and unsuitable environmental conditions;
fire-rated construction and compartmentation should be coordinated where required;
electrical rooms should not become storage rooms or circulation shortcuts;
sufficient space should be reserved for future maintenance, replacement and expansion.

These are planning principles, not substitutes for the project-specific electrical design or applicable statutory requirements.

1. What Is Electrical Equipment in a Building?

Electrical equipment refers to the components used to receive, transform, distribute, control, protect, measure, store or provide electrical power within a building.

Depending on the building type and electrical load, this may include:

electrical substations;
transformers;
RMUs and HT equipment;
MV/LV switchgear;
main distribution boards;
sub-main distribution boards;
floor distribution boards;
electrical meters;
busduct or busbar systems;
electrical cable trays;
electrical risers;
standby generators;
automatic mains failure panels;
UPS systems;
battery systems;
power-factor correction equipment;
solar PV equipment;
EV charging equipment;
emergency power equipment;
lighting-control equipment;
communication and data equipment.

The equipment list should be established during the early design stage because each item affects the architectural space requirement.

2. Why Is Equipment Placement Important?

Poor electrical equipment placement can create problems that become expensive to correct after construction.

The location of electrical equipment affects:

2.1 Safety

Electrical rooms must restrict unauthorized access and provide appropriate working space around equipment.

2.2 Accessibility

Maintenance personnel need safe access to equipment without passing through inappropriate occupied spaces.

2.3 Equipment Operation

Transformers, generators and switchgear generate heat and may require ventilation or other environmental controls.

2.4 Fire Safety

Electrical rooms, substations and emergency power systems may require fire separation, protected construction and other measures depending on the equipment and applicable code.

2.5 Cable Length

A poorly located electrical room can result in unnecessarily long cable routes, larger shafts and additional distribution losses or installation complexity.

2.6 Maintenance

Equipment may eventually need to be inspected, repaired, removed or replaced.

2.7 Future Expansion

Electrical demand may increase during the life of a building. Space planning should therefore consider future modifications.

NBC 2016 identifies planning spaces for substations, switchrooms, emergency power backup systems, distribution panels, cables and related electrical installations as part of building-services planning. [1]

3. Basic Electrical Equipment Hierarchy in a Building

A simplified electrical distribution sequence can be understood as:

Utility/Grid Supply → Metering → HT Equipment → Transformer → MV/LV Switchgear → Main Distribution Board → Rising Main/Cable Distribution → Floor Distribution Board → Final Circuits → Loads

The exact arrangement varies according to building type, voltage, utility requirements, load and electrical design.

For an architect, understanding this sequence is important because each transition requires physical space.

For example:

incoming supply requires an appropriate entry point;
metering requires accessible meter space;
transformers require equipment space;
switchgear requires working and maintenance space;
vertical distribution requires risers;
floor distribution requires electrical cupboards or rooms;
final circuits require coordinated ceiling, wall and floor routes.

4. Main Types of Electrical Spaces in Buildings

Electrical Space	Main Function	Typical Architectural Consideration
Meter Room	Utility metering and incoming supply equipment	Accessible to utility personnel
Substation	Receives/transforms/distributes electrical supply	Location, safety, fire separation and equipment access
Transformer Room	Houses transformer equipment	Heat dissipation, clearances, fire and maintenance
HT/MV Room	Houses high/medium-voltage equipment	Restricted access and electrical safety
LV Switch Room	Main low-voltage distribution	Close to load centre and vertical distribution routes
DG Room	Standby generation	Ventilation, exhaust, fuel, noise and vibration
UPS Room	Uninterruptible power supply	Thermal management, battery safety and maintenance
Electrical Shaft	Vertical cable/riser distribution	Continuous vertical alignment and fire stopping
Electrical Panel Room	Local distribution/control	Accessibility and safe working space
Server/Data Room	IT and communication equipment	Cooling, power redundancy and access
EV Charging Area	Electric vehicle charging	Electrical capacity, ventilation and parking coordination

5. General Principles for Placement of Electrical Equipment

5.1 Locate Equipment According to Its Function

Equipment should be positioned according to the electrical distribution sequence.

For example, placing the transformer at one end of a building and the main LV distribution equipment at the opposite end may create unnecessarily complicated cable routes.

The architectural layout should therefore be developed with the electrical engineer so that the major equipment follows a logical distribution path.

5.2 Consider the Electrical Load Centre

For large buildings, switchrooms should generally be positioned close to the electrical load centre where practical.

This can reduce:

cable lengths;
shaft sizes;
distribution complexity;
voltage-drop issues;
installation cost;
maintenance difficulties.

A Delhi standardized development and building regulation document based on NBC 2016 specifically states that separate switchrooms in large installations should be located as close as possible to the electrical load centre and positioned so that riser shafts can run efficiently to upper floors. [4]

The load centre does not necessarily mean the geometric centre of the building. High-load areas such as central air-conditioning plants can significantly influence the electrical load distribution.

6. Placement of Electrical Substations

A substation is one of the most important electrical spaces to resolve during early architectural planning.

The substation may include:

incoming HT equipment;
RMU;
metering;
transformer;
MV/LV switchgear;
cable trenches;
protection equipment;
associated control equipment.

The arrangement depends on the electrical system and utility requirements.

Architectural considerations

A substation should be planned with consideration for:

access from outside;
equipment movement;
electrical safety;
fire safety;
ventilation;
cable entry and exit;
drainage;
structural loading;
equipment replacement;
future expansion.

Existing Archi-Monarch guidance already explains the relationship between the meter room, HV room, transformer and MV panel. The revised article should retain that concept but place it within a broader architectural-planning framework. [5]

7. Transformer Room Placement

Transformers may be dry-type or oil-filled, and their planning requirements are not identical.

Dry-type transformers

Dry-type transformers may be suitable for certain indoor applications because they generally reduce the quantity of combustible liquid associated with oil-filled equipment.

However, they still generate heat and require appropriate clearances, ventilation and access.

Oil-filled transformers

Oil-filled transformers require additional attention because of the fire and oil-spillage risks associated with the equipment.

CEA’s 2023 safety regulations include provisions dealing with substations and switching stations containing oil-filled apparatus, including requirements relating to safety clearances, oil drainage, fire barriers and oil-containing arrangements. [3]

Therefore, architects should never assume that a transformer room is simply a normal enclosed room.

8. Should a Transformer Be Placed in a Basement?

There is no single universal answer for every building, because requirements depend on transformer type, oil quantity, local regulations, utility requirements and project conditions.

However, the architectural principle is clear:

Transformer location must be established from the applicable electrical and fire-safety requirements before the basement layout is finalized.

For example, Indian regulatory guidance derived from NBC 2016 distinguishes between oil-filled and dry-type installations and contains specific restrictions and exceptions concerning their locations. [4]

The project team should therefore verify:

transformer type;
oil quantity, if applicable;
local electricity authority requirements;
fire-service requirements;
access for equipment replacement;
flood risk;
drainage;
fire compartmentation;
ventilation;
structural capacity.

9. Electrical Switch Room Placement

The switchroom is one of the spaces that should be considered early in the architectural planning process.

A separate switchroom may be required in large installations where a substation is not provided.

A good location should:

be close to the electrical load centre;
provide safe access;
allow equipment maintenance;
support efficient cable distribution;
connect logically to electrical risers;
avoid unnecessary cable bends;
permit future modifications.

The room should not be located merely in whatever leftover area remains after planning the occupied spaces.

10. Electrical Room Access

Electrical equipment requires more than a normal door.

The access strategy should consider:

Personnel access

Authorized electrical personnel must be able to enter safely.

Equipment access

Large equipment may need to be brought into the room during construction.

Replacement access

Transformers, switchgear and generators may eventually require replacement.

Emergency access

Emergency responders and authorized personnel may need access under abnormal conditions.

External access

For major equipment, direct external access can significantly improve maintenance and replacement operations.

A useful architectural question is:

“If this equipment fails after ten years, how will it be removed?”

If the answer requires dismantling a façade, breaking a structural wall or moving through occupied offices, the equipment access strategy is probably inadequate.

11. Equipment Movement and Replacement

Equipment movement should be considered before finalizing:

door width;
corridor width;
ramp;
service lift;
loading bay;
access hatch;
removable façade panels;
equipment lifting points;
structural openings.

The path from the delivery vehicle to the equipment room should be studied as a complete route.

This is particularly important for:

transformers;
generators;
large UPS systems;
batteries;
switchgear;
large electrical panels.

The design should also consider whether equipment can be removed without disturbing adjacent equipment.

NBC-based electrical guidance emphasizes providing suitable arrangements for installation and removal of substation equipment. [5]

12. Electrical Equipment and Structural Coordination

Electrical equipment can impose significant structural requirements.

Architects should coordinate:

equipment weight;
plinths;
housekeeping pads;
floor loading;
vibration isolation;
cable trenches;
floor openings;
sleeves;
structural beams;
equipment access openings;
lifting arrangements.

For example, a transformer should not be placed on a slab simply because sufficient plan area is available. Its weight and support requirements need structural coordination.

The same applies to generators, UPS systems, battery systems and large switchboards.

13. Electrical Shafts and Vertical Distribution

Electrical shafts provide vertical pathways for:

power cables;
busducts;
communication cables;
fire alarm cabling;
control cables;
other electrical services.

The shaft should ideally be planned as a continuous vertical zone.

A well-planned electrical riser:

reduces unnecessary horizontal cable routes;
simplifies coordination;
improves maintenance access;
reduces construction conflicts;
allows predictable floor-to-floor distribution.

The electrical shaft should be coordinated with structural openings from the beginning.

Do not wait until the structural drawings are finalized and then cut openings for electrical services.

14. Location of Electrical Risers

Electrical risers are often placed near:

service cores;
lift lobbies;
common corridors;
service shafts;
electrical rooms;
utility zones.

However, the location should be selected based on the building’s actual distribution strategy.

For high-rise buildings, a good riser location can reduce the length of horizontal distribution on every floor.

The riser should also have adequate access for inspection and maintenance.

15. Fire Stopping at Electrical Shafts

Electrical cables frequently pass through:

floor slabs;
fire-rated walls;
shafts;
electrical rooms;
fire compartments.

Penetrations must therefore be coordinated with the fire strategy.

Where fire-rated construction is involved, openings around cables and services should be protected using an approved fire-stopping system appropriate to the wall/floor assembly and applicable requirements.

The objective is to prevent the service penetration from compromising the fire-resistance performance of the construction.

This is particularly important in high-rise buildings and buildings with multiple fire compartments.

16. Electrical Equipment and Water Services

Water and electrical equipment should be carefully coordinated.

Avoid unnecessary placement of electrical equipment:

directly below water tanks;
below plumbing distribution where leakage can affect equipment;
adjacent to wet areas without appropriate protection;
in locations vulnerable to flooding;
beneath drainage systems where leakage risk is significant.

Existing Archi-Monarch substation guidance also identifies the need to avoid locating substations immediately above or below plumbing or STP water tanks. [5]

Where flood risk exists, the electrical installation should be elevated or otherwise protected according to the project-specific risk assessment and applicable requirements.

17. Ventilation of Electrical Rooms

Electrical equipment generates heat.

Therefore, ventilation should be considered during architectural planning rather than added later.

Depending on the equipment, ventilation may involve:

natural ventilation;
louvers;
mechanical exhaust;
forced ventilation;
dedicated cooling;
heat rejection systems.

The required system depends on equipment heat generation and environmental conditions.

For transformer rooms, special attention should be given to heat dissipation.

NBC-based guidance identifies the need for proper ventilation and, where necessary, lower-level fresh-air louvers and higher-level exhaust arrangements. [4][5]

18. DG Set Room Placement

Diesel generator sets create a combination of architectural and engineering issues:

heat;
exhaust gases;
noise;
vibration;
fuel storage;
equipment access;
ventilation;
fire safety.

A DG room should therefore not be located like an ordinary mechanical room.

Indian building guidance based on NBC 2016 places restrictions on DG set locations and requires appropriate ventilation and exhaust when generators are installed indoors. [4]

The exact arrangement must be coordinated with the applicable building regulations, fire requirements and equipment manufacturer.

Important architectural considerations

Provide:

equipment access;
ventilation;
exhaust route;
acoustic treatment where required;
vibration isolation;
fuel-system coordination;
fire protection;
maintenance clearance;
safe separation from occupied spaces.

19. Noise and Vibration

Electrical equipment can create noise and vibration.

Important sources include:

transformers;
generators;
cooling equipment;
UPS systems;
large electrical machinery.

Avoid placing noisy equipment immediately beside:

bedrooms;
classrooms;
conference rooms;
hospitals’ sensitive patient areas;
recording studios;
libraries;
offices requiring acoustic privacy.

Where equipment must be near occupied spaces, coordinate:

vibration isolation;
resilient mounts;
acoustic enclosures;
wall construction;
ceiling construction;
equipment-room separation.

The appropriate acoustic treatment should be determined by the equipment characteristics and project requirements.

20. Main Distribution Board and Panel Placement

Main distribution equipment should be placed where it can be safely accessed and where cable distribution is efficient.

The location should consider:

proximity to incoming supply;
electrical load centre;
cable routing;
maintenance access;
fire safety;
unauthorized access;
ventilation;
future expansion.

Your existing Archi-Monarch planning article already notes that distribution boards should be located near the centre of the load they serve. [6]

For a new article, this principle should be connected more clearly with architectural planning.

21. Floor Distribution Boards

Floor-level distribution boards should be positioned so that:

they are accessible to authorized personnel;
cable routes are economical;
maintenance does not interfere with major occupied spaces;
the boards are protected from water;
adequate working space is maintained;
doors and furniture do not obstruct access.

In residential buildings, floor electrical cupboards can be coordinated with common circulation and service zones.

In commercial buildings, electrical panels can be integrated into service rooms or electrical closets.

22. Meter Room Placement

Metering arrangements vary according to the utility provider and building type.

The architect should establish:

location of utility meters;
access for utility personnel;
protection against unauthorized access;
visibility/readability;
incoming cable route;
meter-panel ventilation where required;
space for future meters.

In multi-storey buildings, centralized and floor-level metering strategies can require different architectural arrangements.

Therefore, metering should be resolved with the electrical consultant and utility authority rather than assumed from another project.

23. UPS and Battery Room Planning

UPS systems may be required in:

data centres;
hospitals;
offices;
laboratories;
control rooms;
financial facilities;
communication facilities.

The UPS room should consider:

equipment heat;
ventilation/cooling;
battery arrangement;
maintenance access;
electrical isolation;
fire safety;
equipment replacement;
floor loading.

Battery systems require additional safety considerations depending on the battery chemistry and installation type.

The design should follow the applicable electrical, fire and manufacturer requirements.

24. Server and IT Equipment Rooms

Server rooms are electrical and mechanical coordination spaces as much as they are information-technology spaces.

Planning should consider:

dedicated electrical supply;
UPS;
backup power;
cooling;
cable management;
access control;
fire detection and suppression;
equipment loading;
maintenance;
redundancy.

Unlike ordinary office spaces, server rooms can have high heat density and high reliability requirements.

They should therefore be coordinated with electrical and HVAC consultants from the early planning stage.

25. Electrical Equipment and Fire Safety

Electrical equipment is closely related to fire safety because electrical faults can produce heat, arcing or ignition.

The architectural design should coordinate:

fire-rated electrical rooms where required;
fire compartmentation;
protected cable routes;
fire stopping;
emergency power;
fire alarm systems;
fire pumps;
emergency lighting;
fireman’s lift;
smoke-control systems;
fire command centre;
emergency communication systems.

NBC 2016 identifies electrical and allied installations as part of building-services planning, while fire requirements are addressed through the fire and life-safety provisions of the Code. [1][2]

26. Electrical Equipment Serving Life-Safety Systems

Certain building systems must continue operating during emergencies where required.

Depending on the building, these can include:

fire pumps;
fire alarm systems;
emergency lighting;
exit signage;
smoke-control systems;
pressurization systems;
fireman’s lifts;
emergency communication systems;
fire command centre systems.

Electrical planning should therefore distinguish between:

Normal electrical loads

and

Emergency / essential / life-safety loads.

The distribution architecture should be designed so that required emergency loads can receive the appropriate standby supply and protected distribution.

27. Cable Routing and Electrical Equipment Placement

The location of electrical rooms directly affects cable routing.

Good planning aims to achieve:

short and logical routes;
minimum unnecessary bends;
accessible cable trays;
coordinated shafts;
appropriate separation;
maintainable routes;
fire-safe penetrations.

CPWD electrical specifications illustrate building power-distribution arrangements incorporating transformers, switchgear, rising mains, essential and non-essential panels, DG supply and major building loads. [7]

This demonstrates why electrical room planning should happen alongside architectural planning rather than after the floor plan is complete.

28. Electrical Equipment and MEP Coordination

Electrical equipment should be coordinated with:

HVAC

Avoid conflicts between electrical equipment and:

chilled-water pipes;
condensate drains;
ductwork;
AHUs;
cooling systems.

Plumbing

Avoid locating electrical rooms where plumbing leakage can affect equipment.

Fire Fighting

Coordinate:

fire pumps;
fire alarm systems;
sprinkler/fire services;
emergency power;
fire command systems.

Structure

Coordinate:

floor loading;
trenches;
sleeves;
openings;
beams;
columns;
equipment plinths.

Architecture

Coordinate:

doors;
access routes;
fire-rated walls;
room dimensions;
ceiling heights;
service corridors;
equipment replacement routes.

29. Electrical Equipment Placement in Different Building Types

Residential Buildings

Common electrical spaces include:

meter room;
electrical shaft;
floor distribution board;
transformer/substation where required;
DG room for larger developments;
EV charging infrastructure.

The main focus is compact service distribution without compromising safety or accessibility.

Commercial Buildings

Commercial buildings often require:

larger electrical rooms;
multiple distribution boards;
UPS;
data/server rooms;
emergency power;
larger electrical risers.

Electrical load distribution becomes more important because HVAC, lifts and other building services can create significant loads.

Hospitals

Hospitals require highly reliable electrical systems.

Electrical planning must coordinate:

essential power;
emergency systems;
medical equipment;
UPS;
critical areas;
redundancy;
electrical safety;
maintenance access.

Special electrical requirements may apply to medical locations.

Hotels

Hotels typically require:

guest-room electrical distribution;
kitchen power;
HVAC power;
lifts;
emergency systems;
fire pumps;
DG systems;
back-of-house service areas.

Data Centres

Data centres can have exceptionally high electrical loads and redundancy requirements.

Electrical equipment may include:

multiple substations;
transformers;
UPS systems;
battery systems;
generators;
switchgear;
redundant distribution paths.

Such buildings require specialist electrical engineering rather than applying generic room-planning rules.

30. Accessibility and Maintenance

Electrical rooms are normally restricted service spaces, but restricted access does not mean difficult access.

The design should provide a safe route for authorized maintenance personnel.

Consider:

door operation;
thresholds;
ramps;
stairs;
service lifts;
equipment handling;
working clearance;
emergency egress;
lighting;
signage.

For major equipment, the maintenance route should be considered from the site entrance through to the final equipment position.

31. Future Expansion

Electrical demand can change during the life of a building.

A good design should therefore consider:

spare panel space;
spare cable routes;
additional electrical riser capacity;
future equipment;
additional transformer capacity where appropriate;
future EV charging;
solar PV;
battery energy storage;
changes in occupancy.

However, future capacity should be based on engineering calculations rather than arbitrary oversized rooms.

32. Flood and Water-Risk Considerations

Electrical equipment is particularly vulnerable to water.

Site and building planning should therefore investigate:

site flood levels;
basement flood risk;
storm-water drainage;
groundwater;
plumbing leakage;
drainage from equipment rooms;
cable trench drainage.

Where a project is in a flood-prone location, electrical equipment may need to be elevated or relocated.

The correct solution should be established from the site-specific risk assessment and applicable authority requirements.

33. Electrical Equipment and Electromagnetic Fields

Electromagnetic fields are relevant to electrical and electronic equipment, but they should not dominate general electrical-room planning.

The existing Archi-Monarch article places substantial emphasis on electromagnetic radiation from routers, computers, generators, transformers and other equipment. [8]

For an updated architectural article, the subject should be treated more carefully.

The primary architectural concerns for major electrical equipment are normally:

electrical safety;
access;
working clearances;
ventilation;
heat;
fire safety;
noise;
vibration;
maintenance;
equipment-specific requirements.

Where electromagnetic compatibility or field exposure is relevant, the electrical engineer should evaluate the specific equipment, operating conditions and applicable standards.

Avoid making unsupported claims that ordinary building electrical equipment automatically creates a health hazard.

34. Common Architectural Mistakes

Mistake 1: Treating electrical rooms as leftover spaces

Electrical rooms should be planned during the early design stage.

Mistake 2: Ignoring equipment replacement

A room may fit the equipment but still fail when replacement is required.

Mistake 3: Providing insufficient ventilation

Heat-producing equipment requires an appropriate heat-removal strategy.

Mistake 4: Putting plumbing above electrical equipment

Water leakage can damage electrical systems and create serious safety risks.

Mistake 5: Ignoring structural loading

Large electrical equipment can impose significant loads.

Mistake 6: Poor riser alignment

Misaligned electrical shafts increase horizontal cable routing and coordination problems.

Mistake 7: Mixing service routes without coordination

Electrical, plumbing, HVAC and fire services need coordinated routes.

Mistake 8: Ignoring fire compartmentation

Electrical penetrations can compromise fire-rated construction if they are not properly detailed.

Mistake 9: Providing insufficient maintenance space

Equipment should not be packed tightly merely to reduce room area.

Mistake 10: Using generic dimensions from another project

Equipment dimensions and clearances vary with the manufacturer, voltage, configuration and applicable standard.

35. Practical Architectural Checklist

Before finalizing the electrical equipment layout, the architect should ask:

Location

Is the equipment located in an appropriate service zone?
Is it close enough to the relevant load centre?
Is it protected from water and flooding?

Access

Can maintenance personnel reach it safely?
Can large equipment be brought into the room?
Can equipment be removed later?

Safety

Is unauthorized access prevented?
Are appropriate clearances maintained?
Are fire requirements coordinated?

Ventilation

Does the room require natural or mechanical ventilation?
Is heat rejection adequate?
Are exhaust routes properly coordinated?

Structure

Has equipment loading been checked?
Are trenches and slab openings coordinated?
Are equipment plinths required?

MEP

Are electrical shafts aligned?
Are cable routes coordinated?
Are HVAC and plumbing conflicts avoided?

Future

Is there reasonable space for maintenance and expansion?
Are spare routes or provisions required?

Documentation

Are plans, sections and details coordinated?
Are equipment dimensions based on the selected manufacturer’s data?
Have electrical, structural, fire and architectural drawings been cross-checked?

36. Recommended Architectural Workflow

A practical workflow can be summarized as:

Step 1 — Estimate electrical load

Determine the anticipated connected and demand loads.

Step 2 — Establish electrical distribution strategy

Determine incoming supply, transformer arrangement, switchgear, distribution boards and standby power.

Step 3 — Reserve major electrical spaces

Identify substation, transformer, switchroom, DG, UPS and other major rooms.

Step 4 — Establish vertical risers

Coordinate electrical shafts from basement/ground level to upper floors.

Step 5 — Coordinate with structure

Confirm floor loading, trenches, openings, beams and columns.

Step 6 — Coordinate with HVAC and plumbing

Resolve ventilation, cooling and water-service conflicts.

Step 7 — Coordinate fire safety

Resolve compartmentation, fire-rated construction, protected routes and emergency power.

Step 8 — Check equipment access

Study installation and replacement routes.

Step 9 — Check maintenance

Verify working spaces and service access.

Step 10 — Finalize drawings

Coordinate architectural, structural and MEP drawings before issuing construction information.

37. Key Difference Between Architectural Space Planning and Electrical Design

Architects should understand an important distinction:

The architect plans and coordinates the building space; the electrical engineer designs the electrical system.

The architect should not independently determine:

final conductor sizes;
protection settings;
transformer ratings;
fault levels;
electrical clearances;
earthing design;
cable sizes;
equipment ratings;
protection coordination.

Instead, the architect should provide adequate, coordinated and buildable spaces based on information from the electrical engineer.

38. Summary Table

Equipment	Main Placement Concern	Architectural Priority
Transformer	Safety, heat, fire, access	Dedicated service space
Substation	Utility access and safety	Early site/building planning
HT/MV Switchgear	Electrical safety and maintenance	Restricted service area
LV Switchgear	Distribution and maintenance	Near load centre
Main Distribution Board	Incoming and outgoing distribution	Accessible electrical room
Floor DB	Local distribution	Accessible service zone
DG Set	Exhaust, heat, noise, vibration	Suitable service/generator area
UPS	Heat, batteries, reliability	Dedicated controlled environment
Battery System	Safety and environmental conditions	Specialist service space
Electrical Riser	Vertical distribution	Continuous coordinated shaft
Meter Room	Utility access	Accessible controlled location
EV Charger	Power, parking and user access	Coordinate with parking and electrical capacity
Server Room	Power and cooling	Specialist IT/service zone

39. Conclusion

The placement of electrical equipment in buildings is an architectural coordination issue as much as an electrical engineering issue.

The best location is not simply the space where the equipment physically fits. It is the location that allows the electrical system to operate safely and efficiently while providing adequate access, ventilation, fire protection, equipment movement, maintenance and future adaptability.

Architects should resolve major electrical spaces during the early planning stage. Substations, transformers, switchrooms, DG rooms, UPS rooms and electrical risers should be coordinated with structure, HVAC, plumbing, fire safety and circulation before construction drawings are finalized.

For projects in India, designers should consult the applicable edition of NBC, the National Electrical Code of India, CEA regulations, relevant Indian Standards, local development/building regulations, fire authority requirements and the electricity distribution licensee’s requirements. These requirements can change, so the current applicable documents should always be checked before construction.

The central principle is simple:

Plan electrical equipment as an integral part of the building rather than as an afterthought.

A well-planned electrical layout improves safety, maintenance, reliability, constructability and the long-term performance of the building.