Control Panel Design

P-J said:

Another thing: The 80% rule? Please read deeper into the NEC code.

Click to expand...

I found this link where in note 4 they say 4 wires should not exceed 80% is this out of date or am I missing something (not meant to be rude in the slightest degree, just trying to get my ducks in line and safe as possible).

ekjohns said:

P-J thanks for the reply. Here is a link to the wire Lowes. length would be 30-40'. Run for 3 hrs. The way I plan to hook it up would be:

dryer outlet - dryer cord (6') - Spa panel - 10/4 wire (30-40') - control panel

Click to expand...

I believe you will be A-Ok with that.

P-J

If the four wires were the three phases plus a neutral, then it becomes more than three current carrying conductors. But if it is the three phase conductors and a ground, that is only three current carrying conductors.

Cool. Thank you both for the help

ekjohns said:

P-J thanks for the reply. Here is a link to the wire Lowes. length would be 30-40'. Run for 3 hrs. The way I plan to hook it up would be:

dryer outlet - dryer cord (6') - Spa panel - 10/4 wire (30-40') - control panel

Click to expand...

Are you sure this is 4 wire? In the picture there is black, white, and green.