×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

twistlock plugs and receptacle question

twistlock plugs and receptacle question

twistlock plugs and receptacle question

(OP)
Stupid question... is it kosher (NEC).. to install a 250 volt 30 amp twistlock receptacle to a 120volt 20 amp branch circuit..It sounds like a violation but cannot find an article that would refer to such an arrangement.
Thanx in advance

RE: twistlock plugs and receptacle question

No, it is not kosher for many reasons and it is a code (NEC) violation.

1. See NEC 406.7

2. The receptacle has to have a matching plug on the receiving circuit.

3. If you do attach a matching 250V plug on a 120V circuit, now someone can plug that in a similar receptacle on actual 250V circuit! Thus frying the 120V equipment and worse, if someone gets hurt. The very intent of article 406.7.

The equipment are listed for 'intended' use only. It is not the intended for a 250V receptacle to be installed on a 120V circuit.    

Rafiq Bulsara
http://www.srengineersct.com

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources