garden shed Ze

[£££sjim]

I have a question.How do I get the Ze for my shed ? do I get it at the intake to the small consumer unit inside my shed then do the usuall Zs= Ze + (R1+R2)The source of supply is from a socket in the garden that is direct from the house CU RCD protected. or would I have to use the Ze from the house intake position. My shed is stand alone with a light circuit 6amp mcb and two radial circuits 20amp mcb all protected by RCD. another problem I have is if the shed CU trips the house Cu trips too. both protected by 30ma RCDs the garden sockets are 32amp mcb.

 

[Pete999]

Without seeing the installation I would say the ZE is taken at the incomer to your shed DB with the earth disconnected and on your cert marked down as ZE at the DB

 

[shanky887614]

I have a question.How do I get the Ze for my shed ? do I get it at the intake to the small consumer unit inside my shed then do the usuall Zs= Ze + (R1+R2)The source of supply is from a socket in the garden that is direct from the house CU RCD protected. or would I have to use the Ze from the house intake position. My shed is stand alone with a light circuit 6amp mcb and two radial circuits 20amp mcb all protected by RCD. another problem I have is if the shed CU trips the house Cu trips too. both protected by 30ma RCDs the garden sockets are 32amp mcb.

why didnt you put the supply on an rcbo then?

 

[Guest77]

Have a nice day and try not to worry to much.

 

[dazza1981]

YAWN zzzzz zzzzz zzzzz
2 weeks away and the same old amature carp !!!!!

 

[GMES]

..

 

[Guest112]

jesus christ...you clearly haven't a clue, get a proffessional in

 

[Pete999]

Didn't get as far as the two RCDs Jesus wept

 

[£££sjim]

Thanks for your efforts at being totally unhelpful and reverting to sarcasm. Only one reply was use full to a genuine query. I am fully qualified but was asking for advise not childish remarks. This is a forum where advise from knowledgeable people is sought. So far you have all failed all but one..your attitude is l am clever your not so I will be a dick. Thanks dick heads.

 

[Octopus]

Thanks for your efforts at being totally unhelpful and reverting to sarcasm. Only one reply was use full to a genuine query. I am fully qualified but was asking for advise not childish remarks. This is a forum where advise from knowledgeable people is sought. So far you have all failed all but one..your attitude is l am clever your not so I will be a dick. Thanks dick heads.

A bit uncalled for me thinks.

Your post was fairly clear and describing a set up where you have 2 RCD's in series, was always going to get you some flack... but you knew that didn't you?

 

[Andy78]

Thanks for your efforts at being totally unhelpful and reverting to sarcasm. Only one reply was use full to a genuine query. I am fully qualified but was asking for advise not childish remarks. This is a forum where advise from knowledgeable people is sought. So far you have all failed all but one..your attitude is l am clever your not so I will be a dick. Thanks dick heads.

Nope, the attitude is don't advise those who clearly have no clue as it will only encourage them.

 

[telectrix]

well, i've got 2 RCDs in series on one of my jobs. it's a stables layout and i'd hate to see a horse die if 1 RCD failed to trip. so there.!

 

[Simonslimline]

Thanks for your efforts at being totally unhelpful and reverting to sarcasm. Only one reply was use full to a genuine query. I am fully qualified but was asking for advise not childish remarks. This is a forum where advise from knowledgeable people is sought. So far you have all failed all but one..your attitude is l am clever your not so I will be a dick. Thanks dick heads.

If this is the case then why are you asking these questions on here?

 

[Guest112]

Hi I'm fully qualified and haven't got a clue and need help!!!

Oh I'll go online and expect the world from internet strangers to help me do a basic job!

 

[£££sjim]

If this is the case then why are you asking these questions on here?

It was what is known as clarification. Not in on site guide 17th addition. No questions stupid only the answer.:angry_smile:

 

[Silly Sausage]

You want the Z[SUB]db[/SUB] at your shed CU?
Use your Earth Fault Loop tester!

 

[Geordie Spark]

YAWN zzzzz zzzzz zzzzz
2 weeks away and the same old amature carp !!!!!

It's amateur - meaning not professional - Not amature - meaning something that gans roond & roond when ye hoy a shyte load of electrickery through it.

 

[Geordie Spark]

YAWN zzzzz zzzzz zzzzz
2 weeks away and the same old amature carp !!!!!

Aye well, when I came back it was as though somebody had blitzed the place with a big broom - there wasn't a shed thread, RCD tripping, bathroom fan wired to an outside light of shall I bond this plastic pipe? thread in sight.

It was bliss for a short while but now I see them sliding back in through the gap under the door.

It wouldn't be so bad if they had a sense of humour but it seems that went the same way as their common sense - Over the hills & far away. (there must be a song about that somewhere) - and they get all arsey.

 

[Silly Sausage]

It's amateur - meaning not professional - Not amature - meaning something that gans roond & roond when ye hoy a shyte load of electrickery through it.

Are your hands attached to your AMs? :smilielol5:

 

[Pete999]

It's amateur - meaning not professional - Not amature - meaning something that gans roond & roond when ye hoy a shyte load of electrickery through it.

Shouldn't that be armature?? lol not being picky or anything

 

[Geordie Spark]

Shouldn't that be armature?? lol not being picky or anything

Yes it should and I deliberately miss-spelled it just as the op did!

And yes - you ARE being picky and I don't suppose that's going to change any time soon!

 

[telectrix]

it's also the protective outer covering of an animal or plant. ( just thought i'd thow that one in ).

 

[Geordie Spark]

it's also the protective outer covering of an animal or plant. ( just thought i'd thow that one in ).

Tel bonny lad .... I'm not sure how to tell you this, but your keyboard seems to be missing it "R"s

 

[telectrix]

twas deliberate geordie, as the spelling of amature . pity you is a bit slow today. :6:

 

[Geordie Spark]

twas deliberate geordie, as the spelling of amature . pity you is a bit slow today. :6:

I told you in another thread - I need my afternoon nap!

 

[Pete999]

Yes it should and I deliberately miss-spelled it just as the op did!

And yes - you ARE being picky and I don't suppose that's going to change any time soon!

Well hush my mouth, and you are correct I wont change

 

[Geordie Spark]

Well hush my mouth, and you are correct I wont change

Good lad,

Billy Joel - Just The Way You Are - YouTube

 

[nickblake]

All you need to do is as you have said measure your r1r2 then Ze at the board of the main house then Zs at the shed board can be done by calculation r1r2 + ze = Zs as its taken from a circuit at the house db it will be Zs not Ze . and the RCD's are not in series they will be in parallel

 

[trev]

Gary moore - over the hills and far away - YouTube
Led Zeppelin - Over The Hills And Far Away (HQ) - YouTube
There ye gan Fatha. 2 o them.

 

[nickblake]

Gary moore - over the hills and far away - YouTube
Led Zeppelin - Over The Hills And Far Away (HQ) - YouTube
There ye gan Fatha. 2 o them.

you missed one where are the tele tubbies

 

[trev]

you missed one where are the tele tubbies

Cba mate, sorry if my omission of your favourites offended you in any way

 

[£££sjim]

All you need to do is as you have said measure your r1r2 then Ze at the board of the main house then Zs at the shed board can be done by calculation r1r2 + ze = Zs as its taken from a circuit at the house db it will be Zs not Ze . and the RCD's are not in series they will be in parallel

Thanks for the sensible reply. That's what i thought but thought maybe just maybe!

 

[PEG]

well, i've got 2 RCDs in series on one of my jobs. it's a stables layout and i'd hate to see a horse die if 1 RCD failed to trip. so there.!

...If you really care,they would both have to be 10 Ma,as they seem to knack if you walk briskly across a nylon carpet,and pat the boogers...:stooge_curly:

 

[davesparks]

well, i've got 2 RCDs in series on one of my jobs. it's a stables layout and i'd hate to see a horse die if 1 RCD failed to trip. so there.!

What trip current are those RCDs?

 

[Pete999]

Thanks for the sensible reply. That's what i thought but thought maybe just maybe!

r1r2 on a radial shouldn't that be R1+R2+ZE= ZS at the shed DB

 

[Octopus]

All you need to do is as you have said measure your r1r2 then Ze at the board of the main house then Zs at the shed board can be done by calculation r1r2 + ze = Zs as its taken from a circuit at the house db it will be Zs not Ze . and the RCD's are not in series they will be in parallel[/QUOTE]

I have to disagree with you:

"The source of supply is from a socket in the garden that is direct from the house CU RCD protected. or would I have to use the Ze from the house intake position. My shed is stand alone with a light circuit 6amp mcb and two radial circuits 20amp mcb all protected by RCD. another problem I have is if the shed CU trips the house Cu trips too. both protected by 30ma RCDs the garden sockets are 32amp mcb"

????

 

[telectrix]

What trip current are those RCDs?

they are both 30mA. the situation arose when the stables sub-main was installed with a 30mA RCD and no RCD protection at the supply end of the SWA. the main board was upgraded to RCD protected when some sockets were added to it. as there have not been any tripping issues for 3 years, i decided to leave well alone.

 

[brucelee]

Better to have to possibly reset 2 RCDs rather than try reset the Horse once fried lol is that your thinking mate

 

[brucelee]

To the Op your Ze at your shed is the Zs of your sub circuit some call it Zdb the only place you find Ze is the(Origin)
so Ze + ( R1+R2 Sub Main) this is your( Ze,Zdb, Zs) for the sub board then if you want the whole Zs then add (R1+R2 Final circuit)

Hows that clear as mud lol

 

[nickblake]

They are still in parallel L and N are the same where ever it comes from even if the supply is fed off the sockets its still Live and neutral , if it was in series then the live would enter the first rcd come out of the neutral of that RCD as a live to the live of the next RCD and the neutral would be connected to the last RCD,