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As it's PME we can't export the earth. I'm not saying 100mA or time delay the chap I was with said that. I thought it would be OK with a 30mA RCD. My understanding was you have to have an RCD upfront for fault protection as a TT systems Zs for it's a circuits would be over the 80% rule so RCD...

Hi all we were looking at a job today where the customer wants to have a garage consumer unit from sockets and lights. The main house board has a spare way before the RCD with a convenient 32a MCB unused :)  I suggested to chap I was working with to have an SWA from the board at the 32a breaker...

Thanks, chaps it's as I thought. I went back with him today and the hob cable was already hard-wired in the hob so we just put the L1 and L2 in the live terminal on the Connection unit. Lol, he didn't like I was right. In the instructions, it says to put both L1 & L2 in the live terminal of...

I was doing something else in the kitchen while he sorted the hob. But he is arrogant and doesn't tend to read the instructions. 

Hey chaps was on a job today where the guy I was with was installing a hob. It was one that had a L1 & L2, N & E.  He wired it in and then later had a message from the customer saying one 2 or 4 rings heat up. It turned out he only connected the L1 to the connection unit. It was a 4...

Good to know. If it is in a house then am I right in thinking if you don’t install one then you don’t have to do a risk assessment ? 

In regards to SPD in a house. If a customer doesn’t want to pay the extra we can’t force them. I had a spark tell me that under the 18th edition SPD must be fitted even in a house and if not a risk assessment should be carried out.    however I thought that in a single house SPD does not have...

Again thanks for your input chaps 

Hi chaps just wondering if you could clarify the following ….. If you have added a new circuit to a board when it comes to the sticker you put on/near the board with all the information I.e ….  Circuit number  Type of wiring  Number of points served  Conductor size Max disconnect etc  As...

Hey Chaps I know with the 18th edition we have to use metal fixings for cables as well as plastic in case of premature collapse.    If say the cable was run in PVC conduit in a wooden summer house would this still be the case ? A: it’s made of wood B: It’s not the main house  I know you can...

It’s not a building site it is a domestic property estate. WPD put in a 3 phase but customer is only using one of the phases for now. He is using the phase to power his new big out building which is completed it just needs to be connected to the new supply. But yes it is uncommon. 

Yes it does comply. I was just a little confused as it is unlike the normal domestic service heads ( TN-S) I see the earth supplied by the sheath not connecting into the head it’s self. But Fleeting thank you for highlighting split concentric cable, that’s probably why. Thanks for you input...

Fair point 

Hey chaps just wondered if I could get some clarification. I understand the difference between earthing arrangements. I know TN-S the earth is sheath of the cable and TN-C-S the earth is combined with the Neutral, PEN conductor.  Whenever I go on a job I normally know what type of earthing...

thanks for that makes sense. Am I right in thinking that in a bathroom supplementary bonding is not needed if there is an RCD protecting the circuits. 

Hi all just wanted to get some clarity with regards to bonding. I understand we bond main gas and water pipes if Metallic. On consumer side.    am I correct in thinking under the 18th edition you don’t need supplementary bonding ?    i.e if you have a boiler in the kitchen do the pipes going...

I should have rephrased my question. Does it need to be banjoed or piranha nutted at both ends. But yeah I get your views it’s probably best to do it at both ends. 

When you are not using the steel wire as the CPC then am I right in thinking you just need to gland at the supply end ? It’s probably best to do it at both ends but I think supply end is sufficient. Obviously if steel wire is CPC then both ends need to be. 

Great thanks again chaps appreciate the input.