This cable on 10 a. 24vdc circuit?

[realolman]

We have some equipment where this cable is used at 24 vdc on a 10 amp fuse, and used for inputs and outputs to a PLC, E-stop and door switch circuits.

Here's a link ... my stuff is 22 awg 15 conductor.

http://www.generalcable.com/NR/rdon...9052B9065/0/Pg009_0014_MultiCond_Unshield.pdf

Is it suitable for this use?

I''ve been looking at Art 800, but I don't understand it too well.

Surely, this is not suitable for a 10 a. circuit @ 24 vdc. Most everything it is used for is electronic... PLC I/O , and safety relay inputs... the 10 a fuse bugs me, though.

How can I determine what uses this cable is suitable for, and how it should be overcurrent protected?

 

[GeorgeB]

Most everything it is used for is electronic... PLC I/O , and safety relay inputs... the 10 a fuse bugs me, though.

How can I determine what uses this cable is suitable for, and how it should be overcurrent protected?

INTERIOR TO A CONTROL PANEL, I've used comparable cable many times. The major PLC manufacturers have their assemblies to move closely spaced terminals to compression box connectors wired with similar material.

I've never seen it protected over 2A, however. IMO the PLC outputs are protected.

On a machine, manufacturer wiring, I've seen it taken between panels, particularly to operator interfaces. If a connector is wired with it (D shell, etc) with pin current ratings under 2A ... there is very little way to wire them with #16 or #14.

This hasn't answered much of your question. But to the 10A protection ... I'd say no.

 

[augie47]

If the 10 amp fuse is the only protection, I would say "no". The 08 Code expanded to include "small condcutors" and shows 10 amps for #16.
Voltage would not br relevant as far as the wires ampacity.
It is highly possible your PLC has soem other current limiting means which would suffcie as the overcurrent..but to repeat what George says.. if it;s only the 10 amp, then NO.

 

[dbaird]

Per NFPA 79 Table 12.5.1

The 22 AWG / 15 C cable only has an Ampacity of 1.5 amps after adjusting for "more then three current carrying conductors" in a cable.

 

[don_resqcapt19]

Per NFPA 79 Table 12.5.1

The 22 AWG / 15 C cable only has an Ampacity of 1.5 amps after adjusting for "more then three current carrying conductors" in a cable.

Looking at 12.5.5 I don't think that derating is required for these conductors, however it looks like 7.2.4.2.1 would require that the OCPD be not greater than 3 amps for these conductors. If they would be increased to in size to #18, they could be protected by a 20 amp device per 7.2.4.2.1. References are from the 2007 edition of NFPA 79.