Recent content by james 29

Adam, As mentioned to a previous post you need to be pretty clear about your intended field. Structure your courses and career around the area you want to work in. I was lucky enough to do a 4 year traditional apprenticeship in a yard building ships and oil rig platforms but as john says they...

Depends on the type of electrical work you want to carry out and in which sector. Commercial, domestic, industrial, installation maintenance etc, Which qualifications do you have at present?

Benholme, Your split board should have the kitchen sockets and shower on the left protected by the rccb. Why a spark would not use the rccb side for such circuits is beyond me. Be careful those circuits had not caused the rccb to trip so he planted them on the isolator side. hth

What are the transformers for you havent made it clear?

I think the important thing here is to get an rcd installed within the enclosure which feeds the consumer unit. Regardless of workmanship or cable sizes, no offence intended guys, it would be very unlikely your TT earth is low enough to satisfy the zs requirements of your mcb's. The size of...

RF, We use a conducting paste to inhibit oxidisation and maintain a good connection. Pirelli do it, its basically a graphite paste and not cancerous like denzo which we also use however. The paste is used massively on Lightning Protection and telecom earthing on all connections copper to...

Peter, Could be a high resistance earth fault possibly on the live side. I would do the basics such as confirm polarity, loop test etc. This is only one possible cause of course. Be careful if you disconnect any earth connections. If the fault is on the consumer side a potential will...

Absolutely no offfence taken, Just thought id explain the post better james

Secure, ZE was what i was referring to but i was also trying to point out with a 100 ohm maximum ze how many circuits are going to have a zs of anywhere near 200 ohms? You seem to be interested in tt systems based on your previous posts so i thought it useful to point this out! The 200...

Securespark, We install a lot of earthing systems/lightning protection and its worth mentioning earthing falls under BS7430 and the ze reading of a tt system should not be more than 100 ohms or it is deemed unstable. The value used to be 200 but an ammendment now requires 100 ohms. The niceic...

Crafty, dont follow the snips thing, Best way is to use a hole cutter and fix the gland as shown. Some swa have an olive inside and others have a roughened section on the actual gland. Make sure the narrow chamfered end points into the gland first i it has one. (wont tighten up otherwise)...

Qedelec, why do you say 6mm is no good for a tns?

What d i do? The readings are fine for a TT as long as you mean live earth not neutral earth!!!

Possibly BAS but it is certainly something which needs to be assessed. The problem is most underground cables are set up for pme. With having seperate conductors for live and neutral which are usually found on overhead TT supplies i would class that as a situation which requires a biy of...

Qedelec, just because someone connects a 16mm tothe neutral block doesnt make it a pme supply. In a pme supply the incoming line has to be earthed at several points. Cant see how you can earth a cable thats 20 foot up unless it has been carried out at each end of the run. I was merely...