1. Introduction (12hrs)
Purpose of estimating and costing, proforma for making estimates,
preparation of materials schedule, costing, price list, tender document, net
price list, market survey, overhead charges, labour charges, electrical
point method and fixed percentage method, contingency, profit, purchase
system, enquiries, comparative statements, orders for supply, payment of
bills. Tenders – its constituents, finalization, specimen tender.
2. Types of wiring (15hrs)
Cleat, batten, casing capping and conduit wiring, comparison of different
wiring systems, selection and design of wiring schemes for particular
situation (domestic and Industrial). Selection of wires and cables, wiring
accessories and use of protective devices i.e. MCB, ELCB etc. Use of
wire-gauge and tables ( to be prepared/arranged)
3. Estimating and Costing: (25 hrs)
3.1 Domestic installations; standard practice as per IS and IE rules.
Planning of circuits, sub-circuits and position of different
accessories, electrical layout, preparing estimates including cost as
per schedule rate pattern and actual market rate (single storey and
multi-storey buildings having similar electrical load)
3.2 Industrial installations; relevant IE rules and IS standard practices,
planning, designing and estimation of installation for single phase
motors of different ratings, electrical circuit diagram, starters,
preparation of list of materials, estimating and costing exercises on
workshop with singe-phase, 3-phase motor load and the light load
(3-phase supply system)
3.3 Service line connections estimate for domestic and Industrial loads
(over-head and under ground connections) from pole to energy
meter.
4. Estimating the material required for (12 hrs)
4.1 Transmission and distribution lines (overhead and underground)
planning and designing of lines with different fixtures, earthing etc.
based on unit cost calculations
103
4.2 Substation: Types of substations, substation schemes and components,
estimate of 11/0.4 KV pole mounted substation up to 200 KVA rating,
earthing of substations, Key Diagram of 66 KV/11KV Substation.