Coastalguy1
Member
- Location
- Virginia Beach, VA
The short version- 108- #8 THHN cu wires, 6-#8 THHN cu gnd(480v), 18-#10 THHN cu, 6-#10 THHN cu gnd (120v control) in a 6" x 6" metalic wireway.
The long version- These wires feed from a control cabinet containing heating coil contactors and controls TO (6) electric duct heater sections; each section is 157kw which is broken down into (1) 120v control circuit & (6) 480v 3 phase power feeds (26.17kw ea.) All wiring is in a 6" x 6" wireway (metal).
The wires are burning up inside the wireway; at the 90 bend. I believe this installation is not in acceptance to NEC 300.34 or NEC 300.20
The long version- These wires feed from a control cabinet containing heating coil contactors and controls TO (6) electric duct heater sections; each section is 157kw which is broken down into (1) 120v control circuit & (6) 480v 3 phase power feeds (26.17kw ea.) All wiring is in a 6" x 6" wireway (metal).
The wires are burning up inside the wireway; at the 90 bend. I believe this installation is not in acceptance to NEC 300.34 or NEC 300.20