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When you work out Voltdrop I know you are allowed up to 5 % for power and 3% for lighting.    If a distribution circuit after calculation will drop 4.6% by the time it gets to the new distribution board where do you stand on running lighting circuits off the new DB as lighting you can only...

I’m just saying for the future if I wanted to start taking on my own domestics jobs or do my own house. I’m not covered by my bosses if I do my own. I’m taking about like 18 months time. My boss is happy for me to take on small jobs on domestic as he is mostly commercial. Im not ready yet I know...

I agree - I think he was meaning because the board powering the Garage CU was only a single RCD it was not covering the bathroom lights and therefore it should have a duel RCD.    I was going to get Napit registered when I have a little more experience but might look else where lol.   

I’m probably leant more on here during the lockdown in the space of a week than I have by asking sparks I’ve work with. Thanks for your honesty and points. I want to be corrected etc as I wanna learn. 

fair. I think he said it’s because the bathroom lights weren’t on an RCD. But from what I understand that wouldn’t  be an issue unless the bathroom lights was the actual circuit you are working on. Would that be right ? 

No I know that was probably a bit harsh. Just frustrated with some of the sparks that have been harsh to me.  Yeah that is a fair point. They just need to be clear and say that rather than fobbing me off. 

Thanks for all you input and yes it does make sense. So basically the ones that don’t wanna help are either not very knowledgeable or arrogant and selfish or don’t wanna share their knowledge. 

Yeah all my findings will be checked by my boss and he will supervise me testing etc.    just another question if you don’t mind.    If a say a customer wanted a garage unit installed but their current CCU it would come off is a plastic enclosure with a single RCD  and obviously not an 18th...

It was given to me in feet i do normally use Meters but yes I guess I am a little older than a 19 year old apprentice. TT wise  am I right in thinking even if you use the suppliers earth but you don’t get the required readings you need to use a earth rod as well ? 

I’m new here and a fairly new apprentice. Want to learn and make the most of this lock down. I do have a general question I would like you thoughts on. So far on here people have been helpful and pointed me in the right direction of what I need to touch up on in terms of my knowledge. However so...

I’m aware of that but does that mean the Electricians guide to building regs not count ? That isn't a Sarcastic question I’m just wanting to clarify. 

I know it says preferably deeper but at least 500mm so that’s why it will probably be 600mm. Yes you can go deeper but at long as it is at least 500mm deep or 600 mm it double digging is to occur then it complies to regulations. But again sorry if I’m wrong I want to learn so don’t mind being...

unless I’ve mis read my Electricians guide to the building regulations  book it states 500mm. But is says if double digging is to occur then 600mm. Please correct me if I’m wrong. P82 5.7.2 Fixed cables. 

Thanks again. In relation to earthing the building I’m told will have steel construction. I know any metal work that comes into contact with earth needs to be bonded. If the steel construction is continuous then one bonding cable will do but if say there is a break between and it’s not...

Underground in depth of 600mm I know it’s only got to be 500mm but just in case of double digging it will be 600mm. 

great thanks there is a double pole switch In between the Henley block and the service fuse but I understand what you are saying now.    I guess the safer option would be to probably run a cable direct from the new building straight into a Henley block but having a switched fuse appropriate to...

great thanks if say we can’t add to the existing outbuilding then because the tails are already spilt into two ( one the house and one to the outbuilding) then can a new Henley block be put in place to spilt the tails 3 ways ?  Then that way it can run straight from the Henley block to the new...

My thought behind putting an RCBO board in the outbuilding is currently the garage is fed of the outbuilding RCD so if the garage trips then it trips the outbuilding. A new board is needed anyway in the outbuilding. Otherwise I guess I could install a duel RCD board which would be cheaper but...

Thank you I will try and find that information out. If say it was 100ft then I presume I would work out the volt drop based on 400ft of cable even through there would be a CU joining the cable ? That obviously there would be some voltdrop already between the Origin and the outbuilding. 

Hi Pro Dave thank you that’s helpful. When I say Single RCD board in the outbuilding I mean a CU with a 100a double pole switch with an RCD not just a garage unit with RCD as main switch. I presume that’s what you mean when you ask what fuse the cable from the Outbuilding to the supply, it would...