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Topic Title: Breaking capacity of BS3036 fuses
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Created On: 27 September 2005 10:22 PM
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 27 September 2005 10:22 PM
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Posts: 256
Joined: 26 August 2005

I know the short circuit breaking capacity of BS3036 fuses is between 1 to 4kA depending on type, but does anyone know which type has what breaking capacity.

Kind regards,

 27 September 2005 11:24 PM
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Joined: 21 September 2005

Only one type of BS 3036 Fuse as far as I was aware. Regards Alan
 28 September 2005 12:01 AM
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Joined: 27 August 2005

For what it's worth ,the familiar Wylex type are rated at 2kA
 02 October 2005 11:17 PM
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Refer Electricity Association - Electricians handbook or IEE on-site guide table 7-2A page 50.

Rated breaking capacity rewirable fuse to BS3036
category of duty S1A rated breaking capacity 1 Ka
S2A 2
S4A 4

I have only ever seen one fuse carrier marked S2 so I take them all to be 1Ka and generally replace the wylex ones with a cartridge fuse, which is required anyway on a ring if the CPC is less than 1-5mm ( IEE onsite guide table 2A page 89) and is usually the case if a rewirable board is fitted.

The problem is around where I live the Houses were built late 1960's and have obslete boards and hence no parts are available, though the PSC is under 1Ka a board change is needed to keep up to requirements of the Regs regards the small CPC on the Socket Rings.


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