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Hi All

When upgrading a fuse board privately or commercially, if the board is right next to the meter (or within a distance less than 3m's) is a 100amp switch fuse required?

I've seen them installed when CU's are installed more than 3m's away.

But generally most electricians I've seen just upgrade the board and do not install a switch fuse after the meter if within close proximity.

Are they wrong in not installing one?

Does this come up as a C3 on the EICR? And if upgrading many CU's for council should Electricians be notifying them that the Switch's are required?

If they don't spec it should the sparks contractor be telling them they must have one?
 
Hi All

When upgrading a fuse board privately or commercially, if the board is right next to the meter (or within a distance less than 3m's) is a 100amp switch fuse required?

I've seen them installed when CU's are installed more than 3m's away.

But generally most electricians I've seen just upgrade the board and do not install a switch fuse after the meter if within close proximity.

Are they wrong in not installing one?

Does this come up as a C3 on the EICR? And if upgrading many CU's for council should Electricians be notifying them that the Switch's are required?

If they don't spec it should the sparks contractor be telling them they must have one?
Are you an Electrician?
 
not a rat - human here! I'm an new electrician and work with electricians some have advised about the 3m rule and to have a 100 amp switch fuse if tails are longer, and some also say that an isolator just after the meter is required.

I'm just slightly confused - I've been working on council properties and the main sparks have not been installing an isolator of some kind after the meter when the board is at the origin.

Just trying to clarify
 
Fine place Hornchurch. :cool:
However the op does seem a bit like he is fishing!
Local councils and housing associations do sometimes spec for an isolator after the meter if your changing the board .....and EDF want you to install an isolator BEFORE the meter when doing new laterals.
 
not a rat - human here! I'm an new electrician and work with electricians some have advised about the 3m rule and to have a 100 amp switch fuse if tails are longer, and some also say that an isolator just after the meter is required.

I'm just slightly confused - I've been working on council properties and the main sparks have not been installing an isolator of some kind after the meter when the board is at the origin.

Just trying to clarify

Have you looked in your regulations book?
I'm surprised that this didn't come up during your apprenticeship but the DNOs generally stipulate that a maximum of 3metres of cable may be connected to their supply before a protective device is installed.
Note that this is a 3metre length of cable between the cutout and CU, not a 3metre physical distance between cutout and CU.
 

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