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Hi Am after some advice as to where to start looking for a problem with a central heating system. It is a S plan system with a Grundfos pump and standard 3 way motorised valve. The pump has suddenly started running constantly and the only way to turn it off is to switch off the mains...

Got some lights to wire in a garden. Plan is to run an swa underground to each point and then use a flex up to each fitting, as the fittings will only accept flex and not swa. Looking at 8 fittings so at some points an incoming and outgoing swa will be present , as well as the flex. It is...

Hi Just after some advice on the following. My extractor fan in the upstairs toilet has burnt out (you can see the motor has burned/charred) (and it smells). The make is a Silavent HLM4t , 20w. This model is no longer available so i am after a replacement. The fan has a live, neutral...

Am fitting an outside light to my house. The supply is going to come from a switch i fit inside the house hallway. Its only a 100w light so it will be put on the light circuit. I have a couple of queries if someone would be so kind. 1, from the switch the cable will be twin and earth fixed...

hi guys, this isnt a DIY question but wanted to know what others thought as there seems to be some good sparks on here. situation..... company i work for had NICEIC contractors replace a 300mm 4 core swa cable(3phase Neutral, armour as earth). the cable was from a suppliers LV fuse...

Hey guys, this is not really a DIY question but as there's some knowledgeable heads on here was hoping someone could assist. got a motor circuit to select a starter/overload relay for. The circuit consists of 3 (3 phase) motors on a radial circuit fed from a bs88 fuseboard. The...

not DIY i know fella's but im sure some on here will offer a usefull opinion. been doing some work in an installation. the building is steel beams/guirders and sheeting with gas pipes and water pipes connected throughout and bracketed onto the guirders/ steelwork. in the main switchroom...

not strictly DIY but from previous viewing of the forum i know theres some knowledgeable sparks on here. picked up an industrial job which requires joining big swa cable. the current setup is a swa cable (240 4 core,swa as earth) coming up from a duct in the ground (inside building)...

any ideas how much to expect anyone? got 12 metres of swa cable which i have stripped. it was 4 core x 400mm2!

hi, just a quick question. i need to replace a damaged light switch. the current switch has 2 switches each one switching the live to 2 different lights. there are 2 cables coming in with a live (red) and a switched live (black) in each (as well as earths). there are no markings on the...

hey guys, not strictly DIY but as theres some knowledgable heads on here im sure you'l know. not had any experience with this before so hopefully someone can help. am fitting an rcd 3 phase socket outlet, the outlet is made by menekes and is 32A 4 pin (3 phases and the earth). it...

not strictly DIY but id appreciatte some thoughts as i know there's some good sparks on here. went to look at a job today at a small ish workshop. there was a ring circuit (singles in conduit) feeding 5 sockets around a small workshop. (no rcd protection required). job is a couple of new...

not strictly diy but am sure someone on here will have the know how. am looking to calculate the volt drop on a 3 phase cable. the cable is wanted to supply a 3 phase welding (no nuetral) machine pulling 80A per phase approx. proposed run is 50 metres. proposed cable is swa pvc 4 core 35mm...

hi is it ok to perform rcd and earth loop test on an rcd socket outlet (spurred from cooker point) that is connected to a board that has 3 ring mains supplying computers and UPS, board has lighting circuits aswell by this i mean, can any damage occur to the computers or UPS by testing what...

hi, not really a DIY question but here goes..... on an industrial build where we are currently doing some work i came across a setup ive not seen before. the main switchroom is right next to a sub station. out of the substation room came 2 big cables (swa 4x300 by the looks of it). These...

been fault finding today at work and after some opinions as installations my norm. the machine is a set of 3 phase rotators driven by motors. its the usual set up. 2 contacters (fwd and rev), a transformer for the 24v supply, pendant and a circuit board for the speed control. the...

opinions please doing a rewire of a factory/ workshop where i work. just about figured out how im going to do it ( been a ball ache because trying to keep downtime down :lol: ) theres a possibility though i may have to joint some big swa. current setup is some 120mm 4 core feeding a Db...

following on from my other post (many thanks to those who took time to give there input by the way) i wonder if anyone had any views on this..... canalis 400A triple pole+N busbar trunking fed from a busbar chamber. feed is via a swa BS5467 4 core 185mm. desired supplys connected from the...

got a 3 phase db to do at work and need some advice really as im predominantly electrical maintenance. the supply cable to the current 2 board is from a busbar chamber. the cable is 4 core swa 70mm. the circuits i need are( other circuits can be removed as we dont need them) 3 x 30A...

am entitled to a knew combi boiler from the council for the house (lucky me). what i wanted to know is if i say yes how will it be powered? do they have to install a seperate circuit from the CU or is it just a matter of spurring off the ring socket supply? worried about my newly...