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I wonder if anyone could assist with this query please ? I am a newbie, so any guidance or alternatives would be greatly appreciated.
I need to run a ring final partly against a wall with internal 25mm Celotex type insulation. The additional Celotex being needed due to reduced cavity...
Following on from another thread I have just replied to it got me thinking about ring circuits and reference methods.
Appendix 15 shows a ring on a 32A MCB. It does begin with a get out clause regarding thermal effects but it just points you Chapter 42 which deals with fire.
If for example we...
My query is about installation reference methods.
Specifically how to choose a reference method where twin and earth cable passes through various conditions when none of the methods seem to fit actual site conditions.
Site conditions are domestic situations where I find myself...
This is something I've been meaning to ask for sometime.
What do you guys put for 'Distribution reference, or distribution reference number' on the forms? Sometimes there is what looks like a specific number on the CU, but more often than not there is nothing to distinguish a particular CU.
Just completed the 18th Regs course and we were given a quick reference guide by the company delivering the course. I have redone it because there were a few typos and here it is in plain black and white or glorious colour
Having a thumb through the OSG and on section 4.5 Main protective bonding of plastic services, it says there is no need to bond an incoming service of the service pipe is plastic....thats kind of a given....my struggle lies on the next page;
"Where there is a plastic incoming...
Hi, been looking at which reference method would be suitable in this case. The cable drops of a ring circuit to each socket are fixed direct to a concrete block wall (using capping) ; kingspan boards are to be dot&dabbed directly to the wall. Im thinking worst case would be ref method 102...
I'm not an electrician, just like to understand things for self learning. I was reading about how reference methods will derate the cable. However, either I have some misinformation or I am not fully understanding.
Given the example of twin and earth, inside plastic conduit, buried in...
I am trying to select a suitable conductor size from Fig 4D1A of the BS 7671 Book, and am encountering a problem because the circuit does not conform to one Reference Method. The circuit conductors leave the distribution board in wall mounted steel trunking, then run through some steel conduit...
I am running a supply to an outbuilding that requires a 22m run from the Main CU (in the garage) to the CU in the outbuilding, at the Main CU it will be a 40A MCB supplying an 63ma RCD protected sub board which will then supply:
6A type B MCB for 12 downlights and an extractor fan
Cables clipped to a brick wall with plasterboard dot n dabbed over them what reference method ?
And any proof as ref c says clipped direct but nic inspector says that means just clipped to a wall the rest of the methods says insulation ?
I was just looking to find out what would be the most appropriate reference method to use.
the distribution circuits leave the fuse board in 3 meters of trunking, then onto basket most of the ciruicts at lower lever then come down the wall in conduit which has been pre installed in...
Has anyone done NVQ 2357 portfolio with Ableskills? I'm just starting my portfolio bridge units 311 312 313 314 315 316 317 and 318 but really struggling how to start. It's really hard to understand the concepts of how they put their wording. My assessor doesn't explain it really well :(...
I've just been flicking through the regs to do some cable calcs for a job and noticed that a 4mm 2 core cable installed using method B (under floors etc) has a capacity of 30A. However it is ok to connect to a 32A MCB for a radial socket circuit. Don't know if its just me missing something...
What is the installation reference method for flat T&E cable, with capping and buried in plaster, am I correct in thinking it is method C as all the others in table F6 (page 150) in the OSG refer to insulation?