Supply Protective Device type

[zsoltimatrix]

Hi all,

I am stuck with this one:

How can you determine what BS type is the supplier main protective device? The one before the CU.

I was doing a PIR in an old house and I am stuck with this one.

Thank you!

 

[Sintra]

Ring your local DNO & they should be able to tell you generally they are BS 1361

 

[sparkylad]

Its usually printed on the Cartidge holder...i.e BS 1361 pt 11

if its in an old mettallic cut out it will be a rewireable Bs 3036.

 

[Deleted member 9648]

Dont bust a gut over it....if i'ts the DNO fuse and i'ts sealed it will be a BS fuse so does it really matter?....personally if there is no Bs type number visible I just write 'not ascertained' in the relevant section.