645.5(e)

[M. D.]

Jeremy, save yourself the time and money and give a quick call to your AHJ, he will read the section and see that there is no need.

This is bad advice ,.as the AHJ does not take on the liability for the work performed.... In Mass. the licensee owns the work he does until he's staring up at daisy roots..

 

[iwire]

From the ROP for the 2002 NEC.

12- 107 - (645-5(e)): Reject

SUBMITTER: Rick Zupan, Lake Oswego, OR

RECOMMENDATION: Revise 645-5(e) read as follows::
(e) Securing in Place. Power cables, f l exible metal conduit,
liquidtight flexible metal or nonmetallic conduit, type MI cable, type
MC cable, type AC cable, communications cables, connecting cables,
interconnecting cables and associated boxes, connectors, plugs and
receptacles that are listed as part of or for, information technology
equipment shall not be required to be secured in place.

SUBSTANTIATION: There is an apparent conflict between this
section and Section 645-5(d)(2). This change and the accompanying
change to 645-5(d)(2) should resolve this.

PANEL ACTION: Reject.

PANEL STATEMENT: There is no conflict between the two sections.
645-5(e) pertains to listed equipment. 645-5(d)(2) is for field-wired
equipment.

NUMBER OF PANEL MEMBERS ELIGIBLE TO VOTE: 14

VOTE ON PANEL ACTION:

AFFIRMATIVE: 12

NOT RETURNED: 2 Kelly, Laney

 

[clevis]

645.5e

645.5e

I understand "listed" to mean UL. There are vendors that supply PDU cables assemblies that are UL listed as for use with IT Equipment. This UL listing allows you to install LTMC in a manner that exploits the NEC requirements. I'm sure this varies from AHJ's but it seems to be a normal install method in datacenters. The inspectors in my metro area look for the UL listing on unstrapped LTMC.

 

[George Stolz]

I understand "listed" to mean UL.

Actually, there are a few listing agencies.

 

[eprice]

Cables are described in Article 400, IMO there is no instance where the NEC considers LFMC as cable.

You are correct, but I have a strange feeling there will be at least two people that will argue that Liquidtight Flexible Metal Conduit is indeed a cable assembly, and all conduit and tubing articles should now be moved to chapter 4. :grin:

Roger

I'm not going to argue that LFMC is a cable... it is a conduit, but article 400 is not the only place where cables are described. There are a number of cables described in chapter 3. (Metal-Clad Cable, Nonmetallic-Sheathed Cable, etc.)

 

[eprice]

Oh yes you can..look at the highlited part of 645.5(E):

645.5(E) Securing in Place. Power cables; communications
cables; connecting cables; interconnecting cables; and associated
boxes, connectors, plugs, and receptacles that are
listed as part of, or for, information technology equipment
shall not be required to be secured in place.

Those two little words allow it. So says L.A. County Building and Safety.

IMO L.A. County Building and Safety is wrong for two reasons:

1) As others have pointed out LFMC is a conduit, not a cable, so 645.5(E) doesn't relax any securing in place requirements for LFMC.

2) the "or" is joining two phrases that both contain a listing requirement involving technology equipment: "listed as part of information technology equipment" or "listed for technology equipment"

 

[jusme123]

You are correct, but I have a strange feeling there will be at least two people that will argue that Liquidtight Flexible Metal Conduit is indeed a cable assembly, and all conduit and tubing articles should now be moved to chapter 4. :grin:

Roger

he is down to one, I was wrong!