S1A S2A S4A how to know which one for 3036 fused?

[ppelec100]

Hi I recently carried out an EICR at my grans house just to get to grips with the inspection side, coding and filling out the forms. I also had my tutor from my 2391 course come to assist me.

When it came to doing the PFC test I recorded 2.66ka. This would exceed the breaking capacity of the S1A (1KA) and S2A (2KA) but not the S4A (4KA) as stated in the OSG.
I looked on the housing of the carrier and could not see any marking to indicate which it was. I had a bit of a browse on here and other forums and come across mixed info stating that 5amp 15amp and 20amp is assumed to be 2KA. 30amp and above is 4KA.

Where can I get info on this or does anyone know off the top of their heads?

Thanks

 

[Tom256]

Hi I recently carried out an EICR at my grans house just to get to grips with the inspection side, coding and filling out the forms. I also had my tutor from my 2391 course come to assist me.

When it came to doing the PFC test I recorded 2.66ka. This would exceed the breaking capacity of the S1A (1KA) and S2A (2KA) but not the S4A (4KA) as stated in the OSG.
I looked on the housing of the carrier and could not see any marking to indicate which it was. I had a bit of a browse on here and other forums and come across mixed info stating that 5amp 15amp and 20amp is assumed to be 2KA. 30amp and above is 4KA.

Where can I get info on this or does anyone know off the top of their heads?

Thanks

The rating refers to containment, and as these are pre EAWR and CDM regs with safety now key, if not marked you have to go with lowest rating 1KA

 

[ppelec100]

The rating refers to containment

Could you expand a little bit on this please?

if not marked you have to go with lowest rating 1KA

So then the protective device would get a code C2 as the PFC exceeds the BC of the 3036. Potentially dangerous but then because they are rewire able fuses it’s not the same as a mcb, where the mcb can be reset but no longer serviceable it might not operate under fault conditions, where as the 3036 fuse it will operate because there is a new wire but I would still C2 because some DIYer will come along and possibly rewire it incorrectly which can be dangerous…

 

[brianmoooore]

Stand to be corrected, but AFAIK you can still use rewireable 3036 fuses for a new installation, if you so desired, providing PFC and breaking capacities are met, and the fuse can only be accessed with the use of a tool. DIY Joe can still fit the wrong size wire.