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Hob! The house is oil fed but the hob comes from the cylinders on the side of the garage which get refilled when needed. I wouldnt say the were extraneous depending on what the gas engineer pipes it up with?

rods spaced less than two rod-lengths apart will interfere with each other because their effective resistance areas will overlap. The overlap increases the net resistance of each rod, making the grounding electrode system less effective than if the rods were spaced farther apart.

Could someone please advise me on this? Cylinders are for a gas hod. ?:|

why do they put the KA ratings on the breakers if there isn't really any point? ---------- Post Auto-Merged at 17:23 ---------- Previous post was made at 17:17 ---------- some bloke just told me that changing the system would help the PSCC due to parallel paths with the previous TNCS system or...

there is no problem if the mcb goes first, ideally that would be alot better! im not sure if the regs says its wrong because on the page after its banging on about it being fine if you have upto 16KA PFC, but at the same time why put those ratings on the mcbs? the mcb failed due to a...

The mcb has failed. The rating and disconnection time. Nothings wrong with them but ive got a high PFC and they can only take 6KA and the regs say it shouldnt be like that. The mcb would go.

Ha yeah obviously that will go first sorry!

The 1361 will pop

its good to have someone to talk too because my boss is a herbert and hard work sometimes, ive learnt everything i know from books and college. ---------- Post Auto-Merged at 23:26 ---------- Previous post was made at 23:24 ---------- because its alot of current under fault conditions. PFC is...

because of the amount of current coming in with regards to the KA rating of the mcb's. Like you said earlier, an im the same, i dont like the PFC being higher. Scares me abit.

I have got a grasp of it, i do them everyday. Ive just never seen this before. Ive made a balls up on my part of forgetting that i would still have a high fault current across phase and neutral regardless. Easy stuff, shouldv known better. Sorry guys for time wasting.

we had a situation the same last week and we changed it to TT, wish i hadnt now my boss is gunna kill me when he gets back.

Because i dont like doing my job wrong when i get into situations like this. i just thought a TT would help in a way.

so changing it to a TT will do it actually no good at all then....great. My life gets better & better.

its not my house, ive just done a periodic inspection and came across this. I was just concerned because ive never seen anything this high before? the transformer is right next to the house thow. My old boss just use to tell me that PEFC is the important one you should worry about, and i thought...

PEFC is the highest

We were thinking about changing the TNCS to a TT to bring it down, would that help at all? ive never come across this before?

Hi, Could anyone help me with regards to a high PEFC reading on a PME an how i could go about lowering it? 11.1KA.