Router has died. Need Advise Please.

[EddyCurrent]

Bear in mind that ABB's recommendations for cable size are probably trying to cover themselves for most applications, whereas our application is quite specific.

Jonathan, I fully understand what you are saying but it's a bit like the DIY person who installs a new 13amp socket outlet using a bit of 3 core flex because he only wants to plug a table lamp into it. They sell the house and next owner plugs a 3 bar electric fire into it.

[Clive S]

The supply cable could be 4 core armoured.

Eddy Do you not think that this is a bit OTT as on these type of VFD's there is not the provision to connect wire armoured cable with a separate box. I don't know of anybody in a DIY situation that would use it. Just my two cents worth ..Clive

[JAZZCNC]

This is going to sound rich coming from ME but come on Lads don't turn it into an argument and pyshics lesson so to confuse the Man.

Bush Flyer 1.0mm/2 is fine for these Spindles and what I've fitted many times without any issues even on heavy use machines but if you want to cross I's & Dot the T's then use 1.5mm/2.

2.5mm/2 for the VFD Input. If near heavy traffic or chance of damage etc then armoured if not then just use 2.5 Flex not ridged mains cable.

[Bush Flyer]

Right 1.5mm/2 cable for the spindle and normal 3 core for the mains but the size I was going to buy 1.5mm/2 cable as that can handle 15amps, and a wall plug is only 13amps.
2.5mm/2 would be able to handle 20amps but still the wall plug is only rated at 13 amps.
Or have I got to take the main feed straight from the fuse box to get 45amp supply in the house ( I hope not.)

[Jonathan]

2.5mm^2 for the VFD input is excessive. 1mm^2 is adequate...so if you want peace of mind go for 1.5mm^2!

It's a 1.5kW spindle, so anything above that and the VFD will cut out within a few seconds - i.e. too fast for the cable to heat up, so you only need to rate the cable for 1.5kW. 1500/230=6.5 amps, hence 1mm^2 (rated for 10 amps) is plenty for a 1.5kW spindle and just enough for 2.2kW as 2200/230=9.6A.

[JAZZCNC]

It's a 1.5kW spindle, so anything above that and the VFD will cut out within a few seconds - i.e. too fast for the cable to heat up, so you only need to rate the cable for 1.5kW. 1500/230=6.5 amps, hence 1mm^2 (rated for 10 amps) is plenty for a 1.5kW spindle and just enough for 2.2kW as 2200/230=9.6A.

Didn't realise it was 1.5Kw spindle so yep 1.5^2 fine.

[EddyCurrent]

Eddy Do you not think that this is a bit OTT as on these type of VFD's there is not the provision to connect wire armoured cable with a separate box. I don't know of anybody in a DIY situation that would use it. Just my two cents worth ..Clive

It's recommended that the supply cable also has a screen so I was meaning the supply cable to the control panel enclosure which I assumed would be metal and wall mounted. Just because people keep saying it's DIY I'm not into dumbing things down. I would suggest the supply be fed by a 16 amp minimum supply, if you want a plug and socket then it's the blue type.

[Bush Flyer]

Right that's it sorted, I have ordered 4 core 1.5mm/2 screened and 1.5mm/2 normal 3 core mains.
Thanks for all your help, once I have it set up and I run into problems I will probably need your help again.

[Clive S]

From your post #25

The VFD is 1.5kw HUANYANG VARIABLE FREQUENCY DRIVE.
The motor is a, Germany Imported Bearing, water cooled spindle 0.8Kw

I take it your spindle is 0.8Kw .. Clive

[Jonathan]

From your post #24

I take it your spindle is 0.8Kw .. Clive

Ahh, this is the point where you consider Eddy's post #31:

Jonathan, I fully understand what you are saying but it's a bit like the DIY person who installs a new 13amp socket outlet using a bit of 3 core flex because he only wants too plug a table lamp into it. They sell the house and next owner plugs a 3 bar electric fire into it.

We wouldn't want someone to change the 800W spindle to 1.5kW and potentially melt the 0.75mm^2 wire that would be fine for the former...