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Either: a) Faulty RCBO b) A very high resistance (that would fail Zs verification for sure) A colleague suggested "ramp testing". The increase in test current should indicate the point at with the device disconnects. Allegedly an RCD or RCBO will disconnect around the 18mA mark but I have...

With a 4mm² the volt drop is very high tbh. It calculates out to 11.88 volts where the maximum permissible is 11.5 volts. The R1+R2 will be 0.69 Ω so assuming you have a decent Ze shock protection shouldn't be a problem but the volt drop is. 75 metres is a huge run. A 6mm² will lose 7.88...

Agreed but there is: a) giving the answer with no explanation b) guiding in the right direction so the learner realises the answer himself c) saying "shut up, you are stupid" or "go away, I am busy". The lad asked for help so he should be given it. We all start somewhere and we never...

Agreed ^^ 1. Main protective bonding (single 10mm²) to the point of entry where the suppliers and consumers' installations meet. As there is no stop cock make the connection 600mm from the floor. This will ensure any changes made by the Water Authority will not affect your equipotential zone...

I totally disagree with this reply. This forum would be the first place I would come to to ask for clarification on anything. We have experts with more or less instant opinions or facts with knowledge of all the statutory and non-statutory documents available. Let's not lose the intention or...

Does the installation have an earth electrode?

£120-£150 But if you buy me a drink I'm anyones :P

A very conscientious fridge man if you ask me :shock:

:D :D :D I only think about you Sheds :D

I love that quote. Then I really do have a vivid imagination but a very apt image I think? :D

LMAO is it just me or does anyone else imagine this as a judge back scuttling the said party over the dock? LMAO :D :D :D :D :D

The Snags and Solutions book (Apr 2005) makes reference to 528-02-04 which is now given under 528.3.3 and states "Where an electrical service is to be installed in proximity to one or more non-electrical services it shall be so arranged that any foreseeable operation carried out on other...

This is not a recognised fault on one of the inspection boards and if a candidate insisted that was a fault and refused to seek further into that area of that board he would be failed for not identifying one of the twelve specified by C&G as pass criteria. The recommendation comes from the...

:D edit: Sorry, i corrected my typo

Proximity of Wiring Systems to other services - Section 528 "......neither a voltage band I or a voltage band II circuit shall be contained in the same wiring system as the same wiring system as the circuit of nominal voltage exceeding that of the low voltage" The 12 volt cable (band I) is...

DOUBLE POSTINGS

Or a 4 Prevention of detrimental mutual influence. Mixing Band 1 and 2 circuits. "Extra Low Voltage circuits should not be run in the same wiring system as 230v circuits unless all ELV cables and conductors are insulated for 230v or separated by an earthed metal screen. Reg:528.1"...

Yes. The three phase breaker used as a "loop"'for the other site supplies. The busbar is modified to allow for a single line connection. The earth is not connected. The neutral is brown. It was also a normal thing to see whereby the three radials all connected into one 32A cb. I can't...

Yes. The earth is twisted around the supply cable. Anything else? :D