I passed my frst ELECSA assesment today, so I thought I 'd share the info I gathered from other threads/forums with respect to the assessment that helped me to get through by refeshing and committing this to memory - the assessor seemed impressed that I didnt need to refer to the books.
I still got an advisory for leaving a bit too much exposed metal on in the CU though, and advised to move the bonding condutor terminations from the suppliers cutout to the CU in future to avoid parallel paths when testing.
Documentation
Latest copy of BS7671 requirements & OSG
Memorandum of Guidance
Approved doc PArt P
Public liability Insurance to ÂŁ2M
Completed Health & Safety Policy
Completed Risk assessment policy
Complaints register / procedure
Previous quotations or contract agreements issued to customers
Ensure Test equipment is in good order
Calibration certificate
Records of calibration, accuracy
Completed installation certificates for inspection
Minor works certificates for inspection
Building Regulations
Chase depths (1/3 vertical, 1/6 horizontal)
Zones for cables Hidden in walls - (150mm from ceiling or corners, width of any accessory)
Drilling of Joists (On centre line, 50mm from edges, max dia 0.25x depth, 3 diameters apart)
Cutting of notches in Joists (0.7-0.25 xbeam length from end, to depth of 0.125 xdepth)
Bathroom zones (0 = in bath, 1= above bath, 2= >600mm from edge of bath)
Kitchen socket distances from cooker/sink (300mm)
Heights of accessories (in zone between 450mm - 1200mm)
The percentage of low energy lighting in new builds.(75%)
Which regulations are applicable to electrical work (A-Structures, B-Fire, C-Moisture, E-Sound, F-Ventilation, L Power conservation, M-access)
Technical Info
Max trip time at 1xL (300ms) and 5xL (40ms) for 30ma RCD
When RCDs are required (e.g circuits with cables less than 50mm depth must be protected by 30mA RCD)
MaX Zs on 6A (6.18Ohm) and 32A (1.16Ohm) for BS60898 TypeB MCB
Max Ze on TNS (0.35Ohm) TNCS (0.8Ohm) and TT (200Ohm) (earthing arragement)
Difference between TT, TNS, TN-C-S systems. (Earthing arraangement)
Size of Meter tails (25mm for 100A Load)
Size of Main earth (16mm) and bonding (10mm) conductors
Max Voltage drop (5%) or (3% for lighting )
Site questions
How you know the test results are either exceptable or not. (Check against OSG for rating of protective device)
How do you verifify the Zs readings taken at a socket outlet? (check max permitted value for MCB rating with OSG)
Where do the main bonding terminates & are they correctly labelled?
How did you confirm continuity of bonding conductors?
How do you do rcd testing
How long do we need to keep copies of installation certificates (3 years for Part P)
How far from beams to site down lights (follow manufacturer instructions)
Are required labels all in place on the CU? (RCD testing, Periodic testing &
Site Testing
Make sure you isolate and test for dead Demonstrate safe isolation procedure
RCD tests
Ze test
Ring final continuity testing
R1 & R2 for ring mains and radials circuits