Electrical Design & Drawing Consultancy Firm in Bangladesh

Primary keyword: electrical design & drawing consultancy firm in Bangladesh

A building's electrical system has to safely and reliably deliver power to everything from lighting and general power points to production machinery, HVAC and fire safety systems. Electrical design and drawing consultancy covers the engineering work behind this — sizing cables and panels, planning distribution, and producing the drawings a contractor needs to install it correctly and an authority needs to approve it.

Imarat Designers & Consultants Ltd. provides electrical design and drawing consultancy services for factory, commercial and institutional buildings across Bangladesh.

What Does Electrical Design & Drawing Consultancy Involve?

Load assessment — identifying and totalling the electrical load from lighting, general power, HVAC, machinery and other equipment
Single line diagram (SLD) preparation, showing the electrical distribution system from incoming supply to final distribution
Panel and distribution board (DB) design and schedules
Cable and conductor sizing, based on load, voltage drop and applicable derating factors
Protective device selection and coordination (circuit breakers, fuses) for safety and selectivity
Lighting design, including layout, lux level calculations and emergency lighting
Earthing and lightning protection design
Standby generator and backup power design, including changeover arrangements
Drawings and documentation for authority submission, tendering and construction

Electrical Design Process

1. Load Assessment

Collecting information on lighting, general power, HVAC, machinery and process equipment loads, including future load allowance where relevant, particularly for factory buildings where machinery loads can be significant.

2. System Design and Single Line Diagram

Developing the overall electrical distribution architecture — incoming supply, main distribution board, sub-distribution and final circuits — and documenting it in a single line diagram.

3. Detailed Design and Calculations

Cable sizing, voltage drop calculations, short-circuit and protective device coordination, and panel schedules are prepared based on the finalised load and distribution architecture.

4. Drawings and Coordination

Layout drawings for lighting, power, earthing and cable routing are prepared and coordinated with architectural, structural and fire safety drawings to avoid clashes.

5. Authority Submission and Construction Support

Drawings and calculations are prepared for utility/authority submission where required, and the consultant can support the contractor with clarifications during installation.

Electrical Design for Factory and Industrial Buildings

Industrial electrical design in Bangladesh carries specific considerations:

Machinery loads. Production machinery often represents the largest share of a factory's electrical load, and can include motors with significant starting current that affects cable and protective device sizing.
Power reliability. Standby generators, automatic changeover systems and, where needed, UPS backup are commonly part of factory electrical design to maintain production continuity.
Fire safety coordination. Emergency lighting, fire alarm circuits and fire pump power supply need to be coordinated with the building's fire safety design.
Compliance requirements. Factory electrical installations are often reviewed under DIFE's Electrical Safety Assessment (ESA) process or buyer compliance programmes; well-documented, code-compliant design and drawings make this review process more straightforward.
Future expansion. Where growth is planned, panels, cabling and incoming supply capacity can be designed with reasonable allowance for future load, reducing the need for a full re-design later.

Codes and Standards

Electrical design in Bangladesh is carried out with reference to the building services provisions of the Bangladesh National Building Code (BNBC 2020), together with internationally recognised electrical standards — such as IEC standards or the US National Electrical Code (NFPA 70) — applied consistently with common Bangladeshi engineering practice, and the connection and metering requirements of the relevant local electricity distribution utility.

Electrical Design vs. Electrical Safety Assessment (ESA)

It's worth being clear about the difference between these two services. Electrical design and drawing consultancy is the process of designing a new or upgraded electrical installation. An Electrical Safety Assessment (ESA), such as the process used under DIFE's factory compliance framework, is a separate inspection of an existing electrical installation against safety requirements. Where an ESA identifies deficiencies, electrical design consultancy can be used to develop the remedial design needed to close those gaps.

Why Choose Imarat for Electrical Design & Drawing Consultancy?

Imarat Designers & Consultants Ltd. is an independent multidisciplinary engineering firm in Bangladesh, with a team of more than 50 engineers and professionals covering electrical, structural, architectural, fire safety and compliance disciplines.

Our electrical design capability is supported by:

Experienced electrical engineers working on factory, commercial and institutional projects
Design carried out with reference to BNBC 2020 and applicable international standards
Direct coordination with structural, architectural and fire safety design under one engineering team
Experience with the practical needs of industrial electrical systems, including machinery loads and backup power

See our full range of engineering services.

Conclusion

Reliable, well-documented electrical design is what keeps a factory or commercial building's power system safe, code-compliant and ready for authority or buyer review. From load assessment through to final drawings, careful electrical design and drawing consultancy reduces the risk of costly rework, safety issues or compliance findings later.

Planning a new electrical installation or upgrade for your factory or building? Contact Imarat to discuss your project requirements.

Frequently Asked Questions About Electrical Design & Drawing Consultancy

What drawings are included in an electrical design package?

A typical package includes a single line diagram, load schedules, panel and distribution board schedules, layout drawings showing wiring, lighting and power points, earthing and lightning protection drawings, and cable/conduit routing drawings, along with supporting calculations.

Is electrical design the same as a DIFE Electrical Safety Assessment (ESA)?

No. Electrical design and drawing consultancy is the process of designing a new or upgraded electrical installation. A DIFE Electrical Safety Assessment (ESA) is a separate compliance inspection of an existing electrical installation, typically carried out by an assessor as part of a factory's regulatory or buyer compliance process. Electrical design consultancy can support remedial design work arising from an ESA's findings.

What standards govern electrical design in Bangladesh?

Electrical design in Bangladesh is carried out with reference to the Bangladesh National Building Code (BNBC 2020) building services provisions, together with internationally recognised electrical standards such as IEC standards or the US National Electrical Code (NFPA 70), and applicable local utility (distribution company) connection requirements, depending on the project.

Does electrical design cover backup power and generators?

Yes. Standby generator sizing and changeover/synchronisation design, along with UPS and other backup power arrangements where required, are typically part of the electrical design scope for factory and commercial buildings.

Can electrical design be coordinated with fire safety and structural design?

Yes, and this coordination is important — cable routing, panel locations, emergency and fire alarm circuits, and fire pump power supply all need to be coordinated between electrical, fire safety and structural/architectural design to avoid clashes and to meet applicable safety requirements.