Are we now required to use sch 80 pvc conduit for mobile home feeders. I had an engineer the other day tell a customer of mine that the pvc on the exisiting service had to be changed to sch 80. And on the flip side of that he had stated that the exisiting 4/0 quaduplex RHW Aul was OK. Frome my understaing we now and for some time had to us RHW-2 wire on mobile home feeders. Another thing, he also stated that iI had to have a clamp on wire entering two of my metal boxes. I have it stapled within 12 inches of each box. Hum, whats wrong. Bill or anyone have any input on this.