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  1. L

    Fault finding questions

    1. I carried out a x1 rcd test on a 30ma rcd and the time came in at 44ms with doesn't comply with the circuit disconnecting by 0.4ms. What is the problem? Old/faulty rcd? X5 was 13ms. 2. Done my continuity test on a ring and all continuity was proved. However my neutrals end to end was 0.61...
  2. D

    rcd test button probs

    Installed under floor heating connected to a rcd socket turned it on floor warms up but test button keeps popping. Dont know what rating the floor is never done any floor heating before and prat that done it has thrown all the gear away. Any rough guesses what size rcd socket needed and how do I...
  3. G

    Cooker Installation

    Hi, I've recently bought a dual fuel cooker which requires hardwiring. The user manual states that it needs to be connected to a double pole control unit with a minimum rating of 32A. However, i've just had an electrician round who, after looking in the manual, said that the oven only needs 8A...
  4. S

    IR ON/OFF Motion Detector Sensor Switch. Problem

    Hi i bought "IR ON/OFF Motion Detector Sensor Switch from Mr Resistor, i wanted to install it in the bathroom, to switch on and off LED light above cabinet, after instalation switch doesnt work, Just hear click sound but doesnt switch off the lights, any ideas please? Where is the problem...
  5. S

    RCBO tripping out

    Hi, ive just fitted a crabtree loadstar RCBO to my split load consumer unit, to supply my smoke detector circuit. When detectors are connected to a MCB they work fine. When connected to the RCBO it trip one of the RCD's. Any advice please?
  6. K

    Lightning protection testing

    Hi all, was hoping someone could explain to me how I test/verify the lightning protection bonding. im generally a domestic electrician as I work for myself, and I've never come across a property with this type of bonding. I'm subcontracting to a local electrician and do all his testing for...
  7. C

    RCBO Trip times very strange.

    Hi when testing an rcbo trip times with 2 vapour proof fittings switched on the times were 378 on times 1 and 154 on times 5 but when i test the rcbo with the vapour proof fittings switched off the times are 21 times 1 and 19 times 5 has anyone had this before. i am using a calibrated robin...
  8. N

    Insulation Resistance Test For Minor Works

    Hi guys, Fairly recently qualified sparky here starting to do small solo jobs. I'm interested in views on insulation resistance testing on works to be signed off with a Minor Works Certificate. (Sorry this is a long post but I wanted to cover everything.) One view on this is that you only test...
  9. T

    Voltage reading puzzle

    230V single phase supply. 6amp Lighting circuit, T&E 1.0/1.0 Readings Highest r1+r2=1.72 IR: L-N, L-E, N-E all >299 Mohms But when energised there is voltage reading across the conductors at the board as follows: N-E 112V L-N 107V L-E 107V Then at the light fittings: N-E 127V L-N 240V (closed...
  10. sajeel

    rcbo tripping

    Rcbo keeps tripping when earth connected it is non earth rcbo. Have performed continuity test on wiring no fault on wiring any ideas ? Circuit is 10a for exterior lighting although nothing connected yet want to sort out earth fault first. Supply is 3 phase tn-c
  11. H

    Earth not connected

    Hi Guys, I discovered that when 'Last Man Out' relays were fitted in the stores, that the earth wires were sleeved but the ends were not connected together. This caused an electric shock from an oversink water heater. I found the same problems at other sites. Company said, ' do not remove...
  12. A

    PDU connected to SurgeX XF2 surge protector = safe ?

    I've been searching for the best surge protector (excluding whole-house solution) and came to the conclusion that SurgeX is the best choice. My problem is that i need 16 outlets to connect everything in my home theather, and the price for the SurgeX devices with a lot of outlets is very...
  13. T

    Shock from rcd? Circuit not connected

    Hi guys, whilst working on a new installation a while back I was putting socket fronts on an upstairs ring, neutrals and earth's were connected in at the board but lives left out. Whilst stripping one of the legs I went N to E and tripped the rcd. I had hold of the wires when another of the lads...
  14. D

    PME final circuits question

    I have a query, Im working on some signage that is connected to a PME supply. This is supplied to a leb header by straight concentric 16mm cable and then to and RCD with outgoing circuits to the sign. Now I have just seen that work by others have been carried out in the form of doubling up on...
  15. N

    And here's one for christmas , call out tripping RCD

    All im going to say is i wonder why :Cables jointed in 2 places doesnt look like it in the pic the terminal block was 3 amp , how not to wire in your oven, hob, light in a cupboard,and cooker hood cables used 6mm 2.5mm 1.5mm 0.50mm all into a 60 amp terminal block, take note the earth to the...
  16. W

    currently have a 3 gang switch want to convert to 2 gang

    hi i have a 3 gang switch currently in the living room, The first switch is a one way to a light outside that is no longer used. The second is a two way that is connected to the switch upstairs. and the third is a two way and is connected to a switch the other side of the living room. I want to...
  17. R

    Sky setup through Labgear HDU 681

    Help please, I have Sky + which was connected via dish direct to sky box in living room, After a recent Re-furb, I purchased the labgear HDU 681, in the hope of distributing the Sky signals to 4 tvs around the house, the setup manual supplied with this is at best very poor and when its switched...

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