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!

*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

Locknut on cable compression gland in hazardous area

Locknut on cable compression gland in hazardous area

Locknut on cable compression gland in hazardous area

Can anyone advise if it is considered essential to fit a locknut to the inside of a compression gland for a steel-wire armoured cable entering a threaded cable entry in an ex'e' enclosure in a Zone 2 hazardous area?

I can understand that the locknut would be essential to maintain earth continuity of the cable armour if the enclosure entry was not threaded (e.g. a punched hole in a glandplate). In fact the gland could fall right out if there was no locknut.

But in a threaded entry, what purpose does the locknut serve? The fastening tension and earth continuity is between the gland and the entry thread. The locknut seems like a nice to have. Does it really add some security? Would the assembly fail a hazardous area inspection without the locknut?

IEC regulations in an Australian oil and gas application.

RE: Locknut on cable compression gland in hazardous area

With Canadian hardware it may depend on the threads. With tapered pipe threads there would not be a need for a locknut. If the hardware has non-tapered threads a locknut may be a good idea, but I would not expect to see straight threads on our Ex hardware.

"Why not the best?"
Jimmy Carter

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! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close