Electrical: new points, circuits, consumer unit (certified electrician): calculator for UK builders
Answer the measurements this calculation needs and JobBosh works out the materials with wastage and pack rounding, the labour hours by role, the plant, the waste and the site needs - then prices them from your own figures, a supplier's quotation or a dated price you record. Free, no account needed to start.
What it works out
- Material: Twin & earth cable (2.5 / 1.5 mm2); Back boxes, faceplates, clips, capping
- Subcontract: Registered electrician: 2 points, 0 circuits incl. certification - by quotation
- Labour: Chase walls, cap, make good (builder's work)
- Waste: Chasing rubble, packaging
The questions it asks
| Question | Unit / choices | Required? | Help |
|---|---|---|---|
| New / moved points (sockets, switches, lights) | nr | required | |
| New circuits | nr | optional - default 0 (labelled assumed) | |
| Replace the consumer unit? | yes / no | optional - default no (labelled assumed) | |
| Who does the specialist work? | one of: own team, existing specialist, find subcontractor, mixed | optional - default find_subcontractor (labelled assumed) | Own team: priced at your rates. Existing specialist: you enter their figure. Find subcontractor: JobBosh drafts the enquiry from the job facts. Mixed: your team's part at your rates plus the specialist's figure. JobBosh never decides who may do the work. |
| Finish | one of: chased and plastered, surface trunking | optional - default chased_and_plastered (labelled assumed) |
The norms behind it, with their sources
Coverage, productivity and wastage defaults you can edit; each carries where it comes from and is shown as assumed until your own benchmark replaces it.
| Norm | Value | Source | Tier |
|---|---|---|---|
| Install a point incl. cabling | 1.25 hr | trade practice | assumed |
| Run and test a new circuit | 4 hr | trade practice | assumed |
| Replace a consumer unit incl. testing | 6 hr | trade practice | assumed |
| Chase, cap and make good per point (builder's work) | 0.75 hr | trade practice | assumed |
| Twin & earth per point | 12 m/point | trade practice | assumed |
A worked example
Answers used: New / moved points (sockets, switches, lights) 2 nr; New circuits 0 nr; Replace the consumer unit? no; Who does the specialist work? find subcontractor; Finish chased and plastered. These are the recipe's own quantities for those answers - the prices are yours, the supplier's or a quotation's, never a figure typed on a web page.
| Kind | Line | Quantity | How it is worked out |
|---|---|---|---|
| material | Twin & earth cable (2.5 / 1.5 mm2) | 26.4 m 1 x roll - 100 m drums | 2 x 12 m + 0 x 25 m |
| material | Back boxes, faceplates, clips, capping | 2 nr 2 x nr - set per point | 2 |
| subcontract | Registered electrician: 2 points, 0 circuits incl. certification - by quotation | 1 item | needs a quotation or your figure - never invented |
| labour | Chase walls, cap, make good (builder's work) | 1.5 hr | 2 x 0.75 h |
| waste | Chasing rubble, packaging | 0.04 m3 | 2 x 0.02 m3 |
Labour on this example: about 1.5 hours across the roles; at your rates it becomes money.
Site questions this work raises: Utilities and welfare, Protection and cleanliness.
Specialists or hire it may need, drafted as enquiries from the job's facts: Electrician (registered).
Notifiable work (new circuits, consumer unit, bathroom circuits) needs a Part P certificate from the registered electrician: a cost line, not an option.
Then what
Price the lines from your crew rates and your material prices (each with its source and date), answer the site questions (parking, skip, welfare, power, water, protection), let JobBosh draft the supplier enquiries you approve, and issue a branded quotation your customer accepts on a secure link. Guest work is kept for 14 days; a free account keeps it for good.
Start a electrical: new points, circuits, consumer unit (certified electrician) job now