Cable Armour of the Teck Cables as Barrier of Power/Comm Cables

[tinotoro]

thread238-123759
Previous answer to this thread says that Canadian inspector determined that a barrier is required even for TECK cable. This would defeat the purpose of TECK cable and CEC code 36.100 explicitly references only to TC (tray cable) to require a barrier. Is there any experience supporting this criteria?

 

[waross]

36-000 Scope (see Appendix B)
(1) This Section applies to installations operating at voltages in excess of 750 V.
(2) The supply authority and the inspection department must be consulted before proceeding with any such
installation.
The inspector may not always be right but he is always the inspector.
Best practice is to use separate trays for low voltage and high voltage cables.
Next best practice is to use approved dividers.
The code is a mimimum standard.
There may have been a revision to the code that the inspector is not aware of.
Discuss this with the inspector with reference to the CEC.
If the inspector remains adamant your best and cheapest course of action may be to gracefully and cheerfully agree to his demand/request.
There has to be a lot of money involved to warrant the time money and future hard feelings that an formal appeal may occasion.


Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[tinotoro]

Thanks Bill. I totally understand about the inspection thing. Nevertheless, code is pretty clear to me, it refers only to TC cables. I am hoping that this was already presented for inspection and had some feedback. It seems to me that not taking advantage of TECK approved specifications would be one of those things of 'we always did so we continue to do it'. I'd appreciate if somebody can share experience.
Thanks.

 

[GroovyGuy]

Hi tinotoro,
Your inspector needs a CE code refresher course. You are permitted to mix armoured cables, of varying voltage classes, in a single tray system without the need for dividers or different tray systems.
Having said that, you do need to be aware of any noise issues that may transferred from a power cable to an instrument cable.
Also note that MV (ie >5kV) armoured cables are not available as TECK, nor are instrument cables. The latter are often called ACIC (ie Aluminum Clad Instrument Cables.)
GG

"I have not failed. I've just found 10,000 ways that won't work." Thomas Alva Edison (1847-1931)

 

[waross]

The TECK designation is used for cables of #4 AWG and larger.
For conductors smaller than 14 AWG the designation is "Armoured Control Cable".
Armoured Instrumentation Cable is available.
The construction is the same as TECK.
A PVC jacket, an Aluminum Interlocking Armour and a PVC outer jacket.

Bill
--------------------
"Why not the best?"
Jimmy Carter