meter tails

[paul b b]

hi chaps,

I have to change a cu, it hac 16mm tails and I am sure that under the 17th they have to be 25mm.

can you confirm this please as it will be for my nic assesment.

thanks

paul

 

[Apache]

What's the main fuse?

Is there an isolator? (ie how easy would they be to change)

 

[paul b b]

What's the main fuse? Is there an isolator? (ie how easy would they be to change)

not sure what the main fuse is prob 100a

the tails go into the bottom of the meter so i cant change them

 

[0151]

you need to find fuse size for test cert

60 amp fuse = 16m tails & 10mm earth

80-100amp fuse =25mm tails & 16mm earth

 

[Apache]

not sure what the main fuse is prob 100athe tails go into the bottom of the meter so i cant change them

How long you got before your assessment? Get DNO to fit an isolator?

 

[Danny]

At the last check I was told 60/80A 16mm tails, 16mm MEC ... 100A 25mm tails, 16mm MEC ... the service head should be quite clear if it's 100A ..

At my Elecsa assessment the other week I could not for the life of me get an answer from the DNO so I entered

80A on the cert .. explained to the assessor and he was happy with that ... I also ran that by the technical people before i did it and they said it was reasonable .. Probably worth checking with the NIC technical section i reckon ..

 

[Badger]

what ever the size of main fuse i always upgrade to 25mm tails and 16mm earth oh and not forgetting the 10mm Water and Gas Bonding

 

[4285sct]

im the same whatever the size of the main fuse 25mm tails 16mm earth 10mm gas and water 4mm min bathroom but thats just me.

 

[jl-heating]

as above always change to 25 mm tails, 10mm mains and 16mm met. not sure about the 4mm though above i would say no to that .

 

[SPECIAL LOCATION]

hi chaps,I have to change a cu, it hac 16mm tails and I am sure that under the 17th they have to be 25mm.

can you confirm this please as it will be for my nic assesment.

thanks

paul

The is NO regulation saying that meter tails have to be 25mm,

On Site guide recommends 25mm as best practice but the big red book only requires them to be adequate CSA for the max load they have to carry.

e.g.

Appendix 4 says

single phase single core thermoplastic

25mm clipped direct can carry 114A

16mm clipped direct can carry 87A

10mm clipped direct can carry 65A

single phase single core thermosetting

25mm clipped direct can carry 143A

16mm clipped direct can carry 109A

10mm clipped direct can carry 81A

Most domestic properties probably never exceed 80A max demand.

so there you go...

In practice though I do always upgrade to 25mm when I am changing a CU.

 

[boltonsparky]

When installing a new consumer unit we allways install 25mm tails and 16mm earth even if this involves cutting seals on the meter. Coincidentally did one today and had to cut every seal on the distributors equiptmant to safely isolate and upgrade.

Ive heard, through someone else that is, that the electric board or whoever controls the meters etc. nowadays won't prosecute for breaking seals etc. if your an approved contractor.

Lets face it i'd rather be done for tampering with seals than the possible consequences of overloading a cable!

 

[SPECIAL LOCATION]

When installing a new consumer unit we allways install 25mm tails and 16mm earth even if this involves cutting seals on the meter. Coincidentally did one today and had to cut every seal on the distributors equiptmant to safely isolate and upgrade.Ive heard, through someone else that is, that the electric board or whoever controls the meters etc. nowadays won't prosecute for breaking seals etc. if your an approved contractor.

Lets face it i'd rather be done for tampering with seals than the possible consequences of overloading a cable!

The meter tails will be protected by the distributor fuse.

if they are 16mm the main fuse is probably 80A,

the more likely problem is a loose screw causing a joint to over heat rather than a meter tail overloading.

:|

 

[batty]

The meter tails will be protected by the distributor fuse.if they are 16mm the main fuse is probably 80A,

the more likely problem is a loose screw causing a joint to over heat rather than a meter tail overloading.

:|

They say I have a few screws loose.

 

[SPECIAL LOCATION]

They say I have a few screws loose.

and some stale cake!!!

I want fresh baked ones next Monday..... :x

not the ones with mould growing on them! X(

] :coat