Tools
Quote & bill
Certificates
EIC
Electrical Installation Certificate — certify new work or an addition.
EICR
Electrical Installation Condition Report — inspect and test an existing installation.
Minor Works
Minor Electrical Installation Works Certificate for a single-circuit job.
PAT testing
Portable appliance inspection & test report — appliance register with pass/fail.
Fire alarm (BS 5839)
Fire detection & alarm system certificate — design/install/commission/periodic.
Emergency lighting (BS 5266)
Emergency lighting completion & periodic inspection certificate.
EV charger
EV charging installation certificate (BS 7671 + IET Code of Practice).
Testing
Calculators
Cable size
Design current + correction factors (grouping · ambient · insulation) → cable CSA.
Voltage drop
mV/A/m × length × current → voltage-drop % against the limit.
Max Zs
Max permitted earth-loop impedance for a device type + rating (compare to measured).
Adiabatic
√(I²t) ÷ k → minimum CPC size for the fault current.
Conduit & trunking fill
Cable cross-section against the containment space factor.
Load / diversity
Connected load × diversity → assessed maximum demand.
R1+R2 expected
Expected R1+R2 from conductor size + length to sanity-check test results.
RCD disconnection time
Max permitted disconnection times for an RCD type at IΔn.
Lighting (lux / lumen)
Lumen method: lux × area ÷ (lumens × UF × MF) → fittings + spacing.