Was talking to a switchboard manufacturer and he mentioned that the switchboards manufactured to BS 61439 are only tested to 70 degrees C, so all the cables attached to/from it must be calculated for 70 degrees. The only reference in the standard which makes some sense about this is section 10.2.3.1 attached. This means that all the XLPE cabling out there which is rated at 90 degrees is under-utilised and is useless.
Many designers I assume, are not aware and proceed in producing the calculations in Amtech or similar with cables to set operate at 90 degrees and think all is ok.
Alright, let me rewrite "all the majority of XLPE cabling out there which is rated at 90 degrees is under-utilised and is useless."
I was really surprised because the said manufacturer starting with S and has a green logo is a major player in the market. To be fair though it is not the manufacturer's issue though, they follow the standards.
Alright, let me rewrite "all the majority of XLPE cabling out there which is rated at 90 degrees is under-utilised and is useless."
I was really surprised because the said manufacturer starting with S and has a green logo is a major player in the market. To be fair though it is not the manufacturer's issue though, they follow the standards.
