Never turn up to a job without the right cable, breakers, or test gear again. Describe the work — consumer unit swap, rewire, new circuit — and get a structured checklist covering PPE, tools, consumables, paperwork, and pro tips in under 60 seconds.
Free plan, no card needed. Pro is £24/month, with 5 days to try it.
Ask, work it out, buy it, tick it off — each step hands to the next. No app hopping.
"Consumer unit swap tomorrow, what do I need?" The Gaffer lists the kit, the test gear and the bits to check before you leave — earthing arrangement, supply type, where the intake is.
Cable size and volt drop over the run, MCB rating for the load, conduit fill. Each number drops into the right calculator as a first pass — you sign it off against BS 7671.
Twin and earth, RCBOs, glands and clips land on a shopping list with a CEF, Screwfix or Toolstation link on every line.
The job sits on one checklist next to the EIC. Tick it as you test, send it to the apprentice, invoice from the van.
Free, no account needed. Quantities go straight onto a shopping list.
Cable Voltage Drop
BS 7671 voltage drop check + Vd %
Volt drop over a run, with the usual 3 and 5 percent figures shown as a guide. Indicative — verify against BS 7671 before you sign the cert.
MCB Sizing
Load → MCB rating + cable size
Load to an indicative MCB rating and cable size, before you order the board.
Conduit Fill
IET on-site guide factor method
How many cables the conduit takes, using the on-site guide factor method as a guide.
AI-generated in under 60 seconds from your job description. Every section editable, shareable, downloadable.
30 years of trade know-how in your pocket. Straight answers to on-site problems, specific to the job you describe — and it reminds you of the bits you'd only remember halfway there.
The Gaffer
Your AI site mate
"What size cable do I need for a 9.5kW shower on a 40m run?"
Right. 9.5kW shower, 40m run — you're looking at 10mm² twin & earth on a 45A MCB. Anything less and you'll get voltage drop issues and a lukewarm dribble. Check your volt drop calc sits under 3% at that length. If it's a TT system, you'll want an RCBO on that circuit too.
Always verify to current regs. On-site conditions may vary.
A structured, 6-section checklist covering PPE, tools, cable/consumables, paperwork, access requirements, and pro tips — all tailored to the specific electrical job you describe. It also generates shopping lists sorted by category.
The Gaffer AI references BS 7671:2018 (18th Edition) guidance. It will flag cert requirements, test procedures, and earthing considerations. Always verify against the current regs for your specific installation.
Yes. Describe the job in detail — domestic rewire, commercial three-phase distribution, fire alarm install — and the checklist adapts. The more detail you give, the tighter the checklist.