Panel wiring and cable size question

[RMS1981]

Hi All

I’m in need of a bit of advice. I’ve recently started a new job and have been given the task of relocating some machinery. There are 3 separate machines on the line with 1 feed from a bus bar with a 35mm cable protected by 125a fuses.

What I’m planning is to take the feed to the first machine through a main switch, then to a terminal block and off to 3 separate 80a fus

 

[RMS1981]

Hi All

I’m in need of a bit of advice. I’ve recently started a new job and have been given the task of relocating some machinery. There are 3 separate machines on the line with 1 feed from a bus bar with a 35mm cable protected by 125a fuses.

What I’m planning is to take the feed to the first machine through a main switch, then to a terminal block and off to 3 separate 80a fus

I’m not sure why my whole post didn’t come through anyhow…

3 separate 80a fuse disconnects, then off to the the machines. According to the cable tables, 16mm cable is enough, but I’m sure I’ve seen somewhere that the cables are de-rated for inside panels and I would actually need 25mm.

I’ve worked in maintenance for years, but not much installation and design experience, so thought it best to ask you guys first!

 

[westward10]

Need more info such as length of circuit and the anticipated loads.

 

[RMS1981]

Need more info such as length of circuit and the anticipated loads.

The circuit is 25m long and the total load will be in the region of 100-110a at a maximum