Garage CU job. info req
- Thread starter acs2006
- Start date
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will post my question to you the_jinj if its possible to post it privately?
at the end of the day, im here to learn, as im sure many others are and to be greeted with such foul language and slanderous comments from other users is something i don't appreciate. treat others how you expect to be treated and all that.
at the end of the day, im here to learn, as im sure many others are and to be greeted with such foul language and slanderous comments from other users is something i don't appreciate. treat others how you expect to be treated and all that.
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acs2006 said:
No point dwelling on the comments that upset you - he was just expressing an opinion - if you bite then they'll bite back.
There's no PM on these forums - why not just post the question back in post #1 and see what happens - if someone says something you don't want to hear just agree to disagree......lifes too short to get wound up all the time
ok the_jinj here goes.
what i want to know is...
persons prefered solutions to supplying mains power to a CU located in a garage?
the CU will have a
32a mcb protecting 3 x 13a sockets (A2 radial,4mm)
6a mcb protecting 3 x 75w flourecents (1.8 factor taken into consideration)
6a mcb protecting a 500w flood/security light (approx 2a)
the CU in the house is very old...older than me. but the wiring is harmonised, but in the old colours.
there is a henry block in place. the main supply feeds from the henry block to three seperate CUs.
What would your choice of cable / cable size be for getting from the henry block to the garage CU ?
What protective device would best suit to protect the garage CU?
the length of the proposed run in approx 9m.
what i want to know is...
persons prefered solutions to supplying mains power to a CU located in a garage?
the CU will have a
32a mcb protecting 3 x 13a sockets (A2 radial,4mm)
6a mcb protecting 3 x 75w flourecents (1.8 factor taken into consideration)
6a mcb protecting a 500w flood/security light (approx 2a)
the CU in the house is very old...older than me. but the wiring is harmonised, but in the old colours.
there is a henry block in place. the main supply feeds from the henry block to three seperate CUs.
What would your choice of cable / cable size be for getting from the henry block to the garage CU ?
What protective device would best suit to protect the garage CU?
the length of the proposed run in approx 9m.
i guess there is no space in the existing CUs but there are spare terminals in the henly blocks?
You need overcurrent protection at the house end. Whether you wan't to put the RCD protection there is up to you.
If putting the RCD protection at the shed end then a DP MCB fitted in a 2 module box should do the job nicely.
If you wan't RCD protection at the house end then either use a small CU or find a suitable RCBO (must have double pole isolation and should ideally have neutral in on a terminal, i belive hanger do one) and put it in a 2 module box.
I'd rate the house end overcurrent protection at 40A and use 6mm 3 core SWA cable. If you use a metal box for the house end overcurrent protection you should be able to gland the SWA to it no problems. At the garage end you can either use a metalclad or an IP rated plastic. IP rated plastic is better if the outbuilding leaks but metal is probablly easier to terminate SWA to. Avoid trying to terminate SWA to indoor plastic stuff its not really tough enough to support the glands.
You need overcurrent protection at the house end. Whether you wan't to put the RCD protection there is up to you.
If putting the RCD protection at the shed end then a DP MCB fitted in a 2 module box should do the job nicely.
If you wan't RCD protection at the house end then either use a small CU or find a suitable RCBO (must have double pole isolation and should ideally have neutral in on a terminal, i belive hanger do one) and put it in a 2 module box.
I'd rate the house end overcurrent protection at 40A and use 6mm 3 core SWA cable. If you use a metal box for the house end overcurrent protection you should be able to gland the SWA to it no problems. At the garage end you can either use a metalclad or an IP rated plastic. IP rated plastic is better if the outbuilding leaks but metal is probablly easier to terminate SWA to. Avoid trying to terminate SWA to indoor plastic stuff its not really tough enough to support the glands.
Have you got the CU already?
If not I'd go with metal gear - 50A MCB in enclosure in the house, run a 6mm 2 core SWA to the CU, terminating in glands at both ends - 2 Pole 63A 30mA RCD fitted in shed.
You could use an A3 radial and 20A MCB with 2.5 T&E for your sockets - you could also lump all your lighting onto 1 6A breaker if needed.
I'll spell check this in the morning when I can see straight lol
If not I'd go with metal gear - 50A MCB in enclosure in the house, run a 6mm 2 core SWA to the CU, terminating in glands at both ends - 2 Pole 63A 30mA RCD fitted in shed.
You could use an A3 radial and 20A MCB with 2.5 T&E for your sockets - you could also lump all your lighting onto 1 6A breaker if needed.
I'll spell check this in the morning when I can see straight lol
Please feel free to ignore this reply, acs, but my response was only prompted by what you'd written. Your level of knowledge, considering you say you've almost finished the 2330, is poor. You also stated that you were 'going self-employed' and that this was for an assessment job, so I hardly think I was jumping to any spurious conclusions about your intentions.
Of course I don't know you (and I'd really rather not) but your lack of knowledge and your juvenile reaction to a bit of mild criticism only serves to further demonstrate that you are simply not ready to be offering your services for financial gain. You're going to have grow up and wise up fast if you're going to stand a chance of passing an assessment.
As other posters have advised, if you don't like what somebody has written you're not going to make it go away by getting worked up; in fact you'll likely attract further negative input. I shan't reply to you any more, as it upsets you so, and I hope you'll take the advice of others, wiser than me ( ) and reciprocate.
Oh and sincere good luck in your venture.
Of course I don't know you (and I'd really rather not) but your lack of knowledge and your juvenile reaction to a bit of mild criticism only serves to further demonstrate that you are simply not ready to be offering your services for financial gain. You're going to have grow up and wise up fast if you're going to stand a chance of passing an assessment.
As other posters have advised, if you don't like what somebody has written you're not going to make it go away by getting worked up; in fact you'll likely attract further negative input. I shan't reply to you any more, as it upsets you so, and I hope you'll take the advice of others, wiser than me (
) and reciprocate.Oh and sincere good luck in your venture.
the_jinj said:Have you got the CU already?
If not I'd go with metal gear - 50A MCB in enclosure in the house, run a 6mm 2 core SWA to the CU, terminating in glands at both ends - 2 Pole 63A 30mA RCD fitted in shed.
You could use an A3 radial and 20A MCB with 2.5 T&E for your sockets - you could also lump all your lighting onto 1 6A breaker if needed.
I'll spell check this in the morning when I can see straight lol
I have the CU for the garage already. wylex, standard 6 way box w/100a main switch.
however i dont yet have the protective device for the house end - i have the trusty old henry block that has been put in place before we moved into the house.
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