Nema 4X panel board

[Aleman]

I was referring to his use of the UR part in conjunction with the listed CB he planned to use, although I can see that the way I worded the comment might have led you to believe it was more expansive. The point being that just because it is a listed Cb and the bus is a UR part does not mean he can use it with that particular listed CB.

The buss is made to use with these specific breakers. I think that means I can use it.

 

[petersonra]

The buss is made to use with these specific breakers. I think that means I can use it.

The instructions that come with the breakers or the bus will tell you if it can be used and how.

Having used some of these bus products before on circuit breakers I can tell you there are often some serious limitations in what you can do with them, although not always. Some are much better thought out than others.

Read the instructions carefully and you should be OK.

 

[don_resqcapt19]

The only issue I can think of is the OSHA standard that requires use of equipment listed by an Nationally Recognized Testing Lab if that equipment is to be used in a place of employment.

 

[Aleman]

The instructions that come with the breakers or the bus will tell you if it can be used and how.

Having used some of these bus products before on circuit breakers I can tell you there are often some serious limitations in what you can do with them, although not always. Some are much better thought out than others.

Read the instructions carefully and you should be OK.

The buss doesn't come with instructions but seriously it's a no brainer. It just saves wiring is all, looks clean. We have used these on panels before and I like them. Eaton makes pretty good stuff for panels/din rail etc.

 

[iceworm]

The only issue I can think of is the OSHA standard that requires use of equipment listed by an Nationally Recognized Testing Lab if that equipment is to be used in a place of employment.

Don -
Do you have a reference? That would be really handy.

ice

 

[jumper]

Don -
Do you have a reference? That would be really handy.

ice

Here ya go:

Note: With respect to 1910.303 and 1910.307, the definition of ?Acceptable? under 29 CFR 1910.399 specifies, with few exceptions, that conductors and equipment must be approved only by ?nationally recognized testing laboratories.? Similar definitions apply to the other sections that require approval.

From here: http://www.osha.gov/dts/otpca/nrtl/1910refs.html

with this:

1910.303(a)

Approval. The conductors and equipment required or permitted by this subpart shall be acceptable only if approved, as defined in Sec. 1910.399.

from here: http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9880

add these:

http://www.osha.gov/dts/otpca/nrtl/index.html

http://www.osha.gov/dts/otpca/nrtl/NRTLarticle.html


with this:

C. Overview of OSHA's NRTL Program

Since its inception, OSHA has required that electrical and other
types of equipment be approved by qualified organizations as one means
to ensure the safety of this equipment. Pursuant to the OSH Act, OSHA
based this requirement on available consensus codes and standards. The
requirements for NRTL approval of electrical equipment are detailed in
29 CFR 1910, subpart S. The provisions of this subpart require approval
\6\ of most electrical equipment used in the workplace. The purpose of
the requirements is to ensure that the electrical products will, when
used in the workplace, provide workers with a high degree of protection
from the hazards associated with use of these products.
---------------------------------------------------------------------------

\6\ That is, "accepted, or certified, or listed, or labeled, or
otherwise determined to be safe" by an NRTL, as defined in 29 CFR
1910.399.

http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=FEDERAL_REGISTER&p_id=21866

and you need this as to tie it all together:

http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9976


Enough?

 

[jim dungar]

Here ya go:
Enough?

Still not buying it.

Note the use of the phrase "may be", this is definitely not the same as 'shall be'.

1910.303(b)(1)(i)

Suitability for installation and use in conformity with the provisions of this subpart;

Note to paragraph (b)(1)(i) of this section: Suitability of equipment for an identified purpose may be evidenced by listing or labeling for that identified purpose.
​

​

And for custom built, listing is not the only choice. (notice the 'or')

Acceptable. An installation or equipment is acceptable to the Assistant Secretary of Labor, and approved within the meaning of this Subpart S:

... or

(3) With respect to custom-made equipment or related installations that are designed, fabricated for, and intended for use by a particular customer, if it is determined to be safe for its intended use by its manufacturer on the basis of test data which the employer keeps and makes available for inspection to the Assistant Secretary and his authorized representatives.