Main switch 160a bs88fuses, 35mm tails feeding busbar chamber with switch fuses ontop feeding distribution boards. A c2 has been given to undersized main tails. I thought that because the tails are only about 400mm long from switch into busbar that it was ok? Thoughts?
I'm doing some past papers for my 17th exam this week and have found 2 questions about bs1361 fuses - their operating times and max zs. I can't find any data in the regs about them.
Am I being blind or are these questions pertaining to old regs that have been removed from the current edition...
11kv/440-750kva 3 phase tx on 200A primary fuses, spotted this at work, whats the max current per phase you can draw on the secondary without rupturing the fuses.
Just trying to work out a cable and fuse size for a 3kva 415/240v transformer with a 2kW load on it, using Amtech single cable, there are no settings for showing a transformer on the load side, is it possible to calc a transformer load on Amtech.
If I use a motor as the load it chooses fuses...
Hi,
I have had 3 phase cut-out and meters for 3 flats moved from my cellar to outside meter cabinet. Sparky has installed switch fuses and around 15 metres of SWA for each flat to relink to old supply point. Work looks decent so I am not disparaging said sparks work. I have a query though.
He...
Evening Gents and Ladies hope all are well, just wondering if anyone can give me advice on where I could attend a training course to be qualified and authorised to remove cut out fuses. I did one many moons ago as an apprentice with the local council when I worked there, we went to Hoy Lake the...
Hi, I'm currently studying for both my 2394 and 2395 exams and I've been thinking of scenarios to test myself of certain theories, I thought of one where a garage board would be fed with a 13a fuse spur with only a 1.5mm armoured buried under ground. So I started thinking about fuses etc and I...
Now obviously I have not seen this with my own eyes as it would involve pulling possible DNO fuses which I would never do...but I have it on good authority that there is a certain small block of flats where each flat has, in a meter box outside the front door, its own meter and what appears to...
hi ya'll
got a query, just questioning my judgemet
been o look at a job were a spark has done a disappearing act and work needs finishing the scenario-
total rewire, new3 phase mains incoming and gas etc
5 storey building
x4 new flats all new installs
by the entrance ground floor x4...
Been to a job where a young couple want to replace their white sockets and light switches with chrome finished. I took a look at their CU and it is a wylex re-wireable fused board with separate RCD covering all circuits. It then became clear they had no idea what a rewardable fuse actually...
What coding would you be giving for old DBS with asbestos behind fuses? As its not affecting electrical safety?
is there something you can put in place of the asbestos when removed, as its to hold in arcing or flashing when the fuse wire blows right?
if you remove the asbestos does this then...
Hi All,
Just trying to double check if there's a reg suggesting a 3phase circuit should have over-current device that disconnects all line conductors at once? Got an old rewireable board supplying 3phase motors with 3 individual fuses.
I'm looking at 530.3.1 ...................
Can anyone...
Hi everyone. I'm doing some work on a farm and came across a problem. The DNO head has 60A fuses in but down stream of that is a 3 phase MEM Glasgow switch fuse with 100A fuses fitted. Obviously there is no discrimination whatsoever there so I explained that the fuses need to be downrated to 50A...
Hi my house has a memera 2000 fuse box. The kind which still requires fuses to be placed in it. Recently it has been tripping on a regular basis every couple of weeks or so.
I have managed to isolate the problem by pulling out one of the 30 amp fuses. This allows all other electric to be on...
Come across a DB in a workshop single 1361 fuse carriers three phase circuit. Does this go down as a c3 or c2? Potential if a fuse goes unit would stop but you would still have 2 phases at it??
Hi Guys
I have just carried out a Periodic Inspection on an installation that must be at least 30 years old
I observed the following and any comments would be greatfuly received
There is an old 6 way rewire able CU when the cover is removed the supply conductors are exposed even with the switch...
hi guys,
I am in no way an electrician so apologies in advance But wondering if you could help me out. I've got a little home recording studio and have just copped a new piece of kit (a compressor) for my setup. Unfortunately it didn't come with the power cord. Power cord is just the standard...
Hi there, I was wondering if I might be able to call on the knowledge of someone with experience of three phase mains supplies from our energy provider. We are a sports club looking into the possibility of installing some new floodlighting around our pitch and are currently in the very early...
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