Detailed Product Description

Electrical Design manual for commercial & residential projects Upto 33KV voltage level



1. General

Fundamentals of electricals

Types of electricity

Source of electricity

Generation, Transmission & distribution of electricity

Ohms law

Symbols

Definitations, Terms & terminologies

Important formulas



2. Codes & Standards to be followed

Indian electricity rules

National electrical code of India (NEC)

National building code of India (NBC)

Applicable standards issued by Bureau of Indian standards (BIS)

Institute of Electrical & Electronics Engineers (IEEE)

Regulations of local fire authorities.

Requirements stipulated by Pollution control Board for Noise, Air &

Water Pollution



3. Electrical equipments and its application used in the installation

Control devices

Measuring devices

Circuit protection devices

Transformers

Diesel generators

Capacitors

Bus ducts, Busbars, Cables (HT/LT) & wires

Motors & Pumps

Luminaries General & Emergency

Isolators & socket outlets

UPS/Inverter& Battery banks

Earthing or Grounding

Lightning arrestor

Building Management Systems(BMS)


4. Means of electrical distribution for installation

Panels(HT/LT)/Switch Board/Motor control centers (MCCs)/Final

Distribution boards (DBs)

Cable trays,trunking or raceways, conduits & underground Pipes

(Concrete/PVC)

5. Major electrical loads used in the installation

Lighting load Internal & external

Utility power load

HVAC loads like Chillers, AHUs, FCUs, Pumps, Fans etc.

PHE & FF loads like Water transfer pumps, Booster pumps, Fire

Fighting pumps, Jockey pumps etc.

Lifts (Elevator) load

Computer & data centre (Server) loads for office building

6. Electrical design calculations

Load & maximum demand calculation

Transformer sizing calculation

DG sizing calculation

Short circuit calculation

Voltage drop calculation

Capacitor sizing calculation

Cable sizing calculation

Earthing calculation

Lighting calculation

UPS/Inverter sizing calculation

Battery sizing calculation

7. Various design stages & Sequence of electrical design procedure

Concept design stage:

Understanding the building plans, elevations & sections

Gathering specific data from the utilities(Electricity board)

Understanding clients specific requirements

Assessment of the type of installation like outdoor/indoor substation(Point of supply)

Preparation of basis of design which should include the cost estimate.

Schematic design stage:

Preparation of Load calculation to arrive maximum peak demand

Sizing of all Equipments,cables,cable trays

Electrical design calculations

Preparation of single line schematic of electrical distribution system with metering options

Preparation of equipment layouts like Substation, plant rooms.

Preparation of lighting, small power, earthing & miscellaneous layouts

Preparation of technical specification

Detailed design stage:

Preparation of detail layouts including sectional details wherever required

Coordination with other services like HVAC,PHE & FF layouts

Preparation of bill of quantities(BOQ)

Issue for tender

Construction design stage:(Generally this stage is performed by electrical Contractors)

Preparation of shop drawings based on the tender drawings issued by

Electrical consultants for installation.

After installation the entire installation shall be tested & commissioned with the respective authorities.

As built drawings shall be prepared and handed over to clients representative.

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