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what sort of service protective device is this?

Former Community Member
Former Community Member
hi went to look at a job and the main fuse is one I didn't recognise and couldn't find one like it online can anyone tell me the code for it?62db4c3504b194a9635f56c32652f402-huge-img_1511.jpg
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    rob gratze:

    Thanks everyone for your posts so could be a 1361 or  a88 fuse So I’m putting in a new cu but  just wanted to know what fuse it is for the paperwork and yep I know the grey box is an isolator 




    You want to know because?



    • The suppliers fuse may be overloaded?

    • The tails may be overloaded?

    • Zs is too high to blow the fuse?

    • The main switch in the CU may be overloaded?

    • The RCDs in the consumer unit may be overloaded?

    • Just to fill a box on the certificate?


    Have I missed anything?


    If none of the above is a potential issue can’t you just go with N/V in the box?
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  • 0
    rob gratze:

    Thanks everyone for your posts so could be a 1361 or  a88 fuse So I’m putting in a new cu but  just wanted to know what fuse it is for the paperwork and yep I know the grey box is an isolator 




    You want to know because?



    • The suppliers fuse may be overloaded?

    • The tails may be overloaded?

    • Zs is too high to blow the fuse?

    • The main switch in the CU may be overloaded?

    • The RCDs in the consumer unit may be overloaded?

    • Just to fill a box on the certificate?


    Have I missed anything?


    If none of the above is a potential issue can’t you just go with N/V in the box?
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