Gray Flex [RE-wrenches]

[Joel Davidson]

Gray flex on air conditioner installations gets hot and wet. For many years,
manufacturers, distributors, installers and inspectors have accepted gray flex.
What should be used on air conditioner installations that would be better,
cheaper and faster than current practices?

Bill Brooks wrote:

> Answer,
>
> USE-2 cable or Tray Cable without conduit using cable glands to connect to
> the junction boxes is cheaper than conduit and more appropriate in many
> cases. Many modules are not "conduit ready". Just because it has a 3/4"
> knockout, does not mean you can put a piece of conduit on it. We have many
> examples of conduit causing junction boxes to pop off the backside of the
> module. If the installation directions don't mention conduit you CANNOT put
> conduit on them.
>
> If you put conduit on a module it must be a minimum of 80C wet-rated. The
> stuff you buy at HOME DESPOT is 60C rated and can weaken and fall apart at
> the temperatures we work with. I'm not making this stuff up or just
> regurgitating John Wiles stuff, I've seen it on several occasions in the
> field. The crap they often put on A/C units rated for lower temperatures
> should NEVER be used on PV system.
>
> Now that oughta get some reaction--anyone care to take me to task on this
> one? (in good fun of course)
>
> Bill.
>
> -----Original Message-----
> From: Joel Davidson [mailto:joeldavidson at earthlink.net]
> Sent: Saturday, April 21, 2001 9:17 AM
> To: RE-wrenches at topica.com
> Subject: Gray Flex [RE-wrenches]
>
> Flexible conduit is used almost always to wire outdoor air conditioners
> and passes inspection. Yet some designers say do not use gray flex for
> PV module interconnects and short sub-panel whips. What is better,
> faster, cheaper than gray flex?
>
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