This item uses a 1/4″ size, which is a staple in the electrical trade.
Aero-Motive Woodhead Industrial Cord Reel 600v 30amp
Cord should be replaced. General wear. I have not used this myself and am not familiar with it.
3M Motor Lead Pigtail Splice Kit 5317 5/8 kV, Non-Shielded, 2-1/0 AWG new in box
I have found that MaxCell works great in both home and industrial settings.
