Invalid combination on computer package

[Top Cat]

Hi just typing in results for a minor works EIC. Feeding a 1mm TWE from spur unit with 3A fuse. The package automatically works out max Zs permitted but when i get to that box it says "invalid combination".

I put in BS 1363 fuse rated at 3Amps.

At the moment i have over written the package and put in 16.4 Ohms but now i am doubting myself, any ideas?

 

[Guest123]

BS 1363 is for the actual plug top itself.

The fuse within it is a BS 1362.:hat:

 

[telectrix]

would you not enter the OCPD for the whole circuit.?

 

[Top Cat]

BS 1363 is for the actual plug top itself.

The fuse within it is a BS 1362.:hat:

 

[Top Cat]

would you not enter the OCPD for the whole circuit.?

Don't know Tel i read it as the OPD for the modified circuit, i suppose you could read it either way.

Any views?

 

[telectrix]

IMO, the circuit starts at the CU and the OCPD for that circuit is in the CU (MCB or fuse), as the FCU and subsequent downstream circuitry is only part of the circuit.

 

[Top Cat]

IMO, the circuit starts at the CU and the OCPD for that circuit is in the CU (MCB or fuse), as the FCU and subsequent downstream circuitry is only part of the circuit.

Thanks Tel, got to redo the form now though!