Electrical Wiring Estimating And Costing By Sl Uppal Pdf Free Verified

| Category | Typical % of Direct Cost | |----------|--------------------------| | General Overhead (office, insurance) | 8‑12 % | | Site Overhead (mobilization, temporary power) | 5‑8 % | | Profit | 5‑12 % | | Contingency (unknowns, design changes) | 5‑10 % |

Formula (example):

Direct Cost = Materials + Labor + Equipment
Subtotal    = Direct Cost × (1 + Overhead% + Profit% + Contingency%)

If your client requires a “fixed‑price” bid, embed the contingency inside the profit margin.

| Equipment | Daily Rate (USD) | Typical Usage (days) | |-----------|------------------|----------------------| | Cable pulling machine (100 lb) | $120‑$180 | 1‑3 | | Conduit bender (hand) | $25‑$45 | 0.5‑1 | | Megger/insulation tester | $80‑$120 | 0.5‑1 | | Category | Typical % of Direct Cost

| Item | Source | Unit | Typical Range (USD) | |------|--------|------|---------------------| | THHN/THWN‑2 copper (12 AWG) | Electrical distributor | $/ft | $0.30‑$0.45 | | PVC conduit (½‑in) | Supplier | $/ft | $0.60‑$0.90 | | MC cable (4‑c 12/2) | Supplier | $/ft | $1.10‑$1.40 | | Switch (single‑pole) | Manufacturer catalogue | $/pc | $0.80‑$2.50 | | Light fixture (LED 4‑ft) | Manufacturer | $/pc | $15‑$45 |

How to Get Reliable Prices

Step 1 – Load Calculation

Step 2 – Current

Step 3 – Material List (Approximate) | Item | Quantity | |------|-----------| | 1.5 sq mm single-core copper wire | 50 m | | 2.5 sq mm copper wire | 30 m | | PVC conduit 20mm | 25 m | | Switch box (4-module) | 1 no. | | 5A switch | 4 nos. | | 15A socket | 1 no. | | Ceiling rose | 3 nos. | | Main DP MCB 16A | 1 no. |

Step 4 – Cost Estimation

This is the exact method taught in S.L. Uppal’s book, but the tables for standardized rates (e.g., conduit per meter, labor hours per point) are copyrighted data you must obtain from the legal book.

If you need the book for academic or professional purposes, here are the best routes: