motor termination temperatures
- Thread starter bh
- Start date
- Status
- Location
- Illinois
- Occupation
- retired electrician
Re: motor termination temperatures
Look at 110.14(C)(1)(4).
Don
Look at 110.14(C)(1)(4).
Don
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Re: motor termination temperatures
Little know and often ignored fact:
Per NEMA Standards Publication ICS 2.4-1989 (R2000)
4.5 TERMINAL TEMPERATURE RISE
Traditional NEMA starters and contactors are designed for use with 60?C temperature wire with a corresponding allowable 50?C terminal temperature rise.
Typically, IEC starters and contactors, and those NEMA starters and contactors so marked, require 75?C temperature wire with a corresponding 65?C allowable terminal temperature rise when UL Listed.
Controller temperature rise requires consideration when an enclosure is selected.
When one type of controller is replaced with the other, the existing wire size, and wire temperature rating, need to be considered.
Little know and often ignored fact:
Per NEMA Standards Publication ICS 2.4-1989 (R2000)
4.5 TERMINAL TEMPERATURE RISE
Traditional NEMA starters and contactors are designed for use with 60?C temperature wire with a corresponding allowable 50?C terminal temperature rise.
Typically, IEC starters and contactors, and those NEMA starters and contactors so marked, require 75?C temperature wire with a corresponding 65?C allowable terminal temperature rise when UL Listed.
Controller temperature rise requires consideration when an enclosure is selected.
When one type of controller is replaced with the other, the existing wire size, and wire temperature rating, need to be considered.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: motor termination temperatures
Motors are not listed but are tested with 75 deg C wire.
Motors are not listed but are tested with 75 deg C wire.
- Status