Hi all, I have just read a report by BRE on the effects on cable supports caused from fire. It stated the obvious about the plastic clips, plastic conduit etc failing. However what I found interesting was that the metal supports failed due to the plastic rawl plugs failing. So I just wondered...
One of what scams.
The company has been going 90 years. This area of electrics although not complicated is new to me.
E.g. some of the furniture is metal with electrics on so at the moment I am bonding everything, pat testing it and treating it as class 1 equipment. I just wanted to find out...
Hi don't know if anyone can help! I have been an install electrician for the last 10 year's, but have now become a maintenance manager of a manufacturing company. I carry out maintenance, install work and also production work which is basically wiring up lights, sockets etc on display units for...
It's not homework. I just had an auditor ask me today. I couldn't remember. I though it was 0.8 x 25 so equals 20 KW. However it's been a long time....
Hi can anyone help please.
I was asked the following question today.
An organisation has determined their sites total power is 25KVA and it's power factor is 0.8. Calculate the site's useful power( including units). Could anybody please help or provide me with equation to calculate the...
It's a large company and large site with a lot of cnc machines etc. There is also a lot of very old plant. Also about 200 employees work there.
The guy who works there at the moment has been there about 40 years, but is retiring at Christmas. However he doesn't seem to work on the machines. He...
Hi all. Just started a new job in electrical maintenance today.
I have spent the last 10 year's doing all types of install work however have decided to move indoors.
The guy who is there at the moment has always had people in to work on the machines rather than do anything himself.
Just...
Hi all. I carried out an EICR yesterday. It was a BG split load consumer unit and when testing I noticed the zs values were coming out high.
I noticed on the 1 rcd there was 0.50 Ohms difference between feed and load side of rcd and on rcd 2 there was 0.60 Ohms difference. Just wondered if...
Don't know if I'm being a proverbial div, but could someone tell me the max Zs for 80A 1361( distribution cct )on a TT system with disconnection time of 1.0 sec. Thanks.
Hi all. I am desperate to more from my role as installation electrician to electrical maintenance. I have gained experience in all areas and sectors. Ie Inspection and testing, fault finding, motors etc. However I appreciate this doesn't really help with today's maintenance jobs with plc's etc ...
I recently done a niceic solar course down south. The guy carrying out the course also carried out courses in eicr's. I put the question to him about what codes I should put to various observations ie ones that were safe but not up to current regs. (Ones I didn't think deserved a code). His...
Hi all, I have done a few EICR's before however could do with a bit of advice on what codes you more experienced guys would give these observations;
1 Old 3036 DB made up of wooden base/back. (C3?)
2 Underszed main bond. (C3?)
3 Cooker switch mounted 18" above cooker (C3?)
4 Mutiple cct's in MCB...
Just to let everyone know. Got to the bottom of it today. Transformer guys came in today and discovered the neutral to earth link was missing in the transformer. Apparently it has been like it since it was installed in May. What made me chuckle was that the guy said it happens quite often...
Tony's info was invaluable. Haven't got to the bottom of it yet, but HV guys are saying they think the same as you guys. A failed or failing neutral. However they haven't carried out any tests out yet. Aalso apparently there was a disturbance on the network (possibly a transient voltage) last...
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc