Contact US

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

Where to Buy Associated Non-Incendive Field Wiring Apparatus?

Where to Buy Associated Non-Incendive Field Wiring Apparatus?

Where to Buy Associated Non-Incendive Field Wiring Apparatus?

I see reference to Associated Non-Incendive Field Wiring Apparatus on equipment Control Drawings all the time. The definition from ISA 12.12.01-2013 is as follows:

associated nonincendive field wiring apparatus
apparatus in which the circuits are not necessarily nonincendive themselves, but that affect the
energy in nonincendive field wiring circuits and are relied upon to maintain nonincendive energy

I'm having a hard time trying to find where can you purchase a device that bears this name. Any ideas? It sounds like it essentially serves the same function as an I.S. barrier. Perhaps I.S. barriers are intended to be used for this purpose as well? If you have installed NIFW(non-incendive field wiring) circuits, please reply with what equipment you used for your 'Associated Apparatus'. This is general question about Non-Incendive Field Wiring, I don't have a particular application in mind.


RE: Where to Buy Associated Non-Incendive Field Wiring Apparatus?

From IEC 60079-0, 'associated apparatus' is "Electrical apparatus which contains both energy-limited and non-energy-limited circuits and is constructed so that the non-energy-limited circuits cannot adversely affect the energy-limited circuits"

Associated apparatus could be a zener barrier, a galvanic isolator, or something which incorporates one or other of those functions within it. An example of something which incorporates it would be Moore's SPA2 trip amps.

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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