Revise your safe isolation, lock it off, safe isolation procedure and keep the key in your pocket for the entire install and do not give them the key.
On the install;
Read the spec thoroughly, stuff like the ring is wired in 2.5 brown and blue, 1.5 green/yellow. one socket will have to be wired as a spur, normally the ip rated one
Lighting wiring is specified, it'll draw a line to the switch first if its 2 plate, line to light first if 3 plate. 2 x two way and intermediate.
remember to set the overload on DOL
clip fp200 suppling c02 detector with p clips not cable ties
do not cable tie armoured, cleat it to tray with nuts and bolts
do not cut protective bonding conductor at the clamp, strip insulation back and connect it to clamp and the crimp a lug onto the other clamp (water and gas) or run two seperate cables.
data is easy, punch down tool, use wiring diagram B on back of outlet
double over conductors if terminal is big enough
use push-in connectors in the switch not normal connector blocks
use banjo on SWA and SY cable and bond it.
s plan is easy, just wire from adaptable box to each point. (spider wired)
Sleeve your conductors (blue sleeve brown in switches etc, sleeve SY conductors etc) anything that needs identifying do it.
Testing:
Safe isolation procedure again just to show you can do it.
disconnect earthing conductor and protective bonding conductors to eliminate parrallel paths and measure R2, under 0.05 ohms complies and tick box on test form. reconnect conductors
carry out your test procedures as usual, make sure you do and r1 +r2 and every point. on the ring remember to cross connect and test at each outlet, r1+rn and r1+r2. dont put a link from MET to breaker, remove line and earth and put in connector block(reduces parallel paths) do and R2 from heating spur to each point on the s plan circuit, operate all switches and retest at light to confirm polarity
disconnect all sensitive equipment for insulation resistance and put in connector blocks, turn s plan spur off, disconnect neutral from board if its not a 4 pole isolator. disconnect ring from rcbo and disconnect rcbo. make sure all breakers are on and test entire board at once, then redo test on ring that is disconnected, and retest lighting circuit after operating switches to check strappers. at heating spur connect line and neutral together and test between them and earth. reconnect neutral.
check supply polarity with voltage indicators
disconnect your earthing conductor when doing Ze
reconnect earth for PFC, record highest, remember to double PSSC as its 3 phase.
phase sequence at mains
replace board cover, engergise and check phase sequence at 16a socket and motor.
Zs, i'd do a test at the sockets and calculate the rest, your allowed to, its quicker in the exam.
rcd test, remember to do on 0 and 180.
check everything works as it should. DOL drops out when breaker is turned off and doesnt come back on when breaker is turned on. stuff like that.
check your max zs comply with the regs (use onsite guide as they are corrected)
fault finding is straight forward just keep your cool, reverse polarity, short circuits, high impedance bonding.
dont go by my test procedure, read GN3 thoroughly, i've just stated the stuff that may not be obvious.
