[RE-wrenches] dual rated 600/1000v cable for HV battery application

[Kirk Herander]

Thanks Ray,
I am going to use the 2kva DLO cable. It is dual rated as RHW-2, which is what inverter OEM recommends. AWC warehouse is also close by in PA. also.
On 8/1/2020 8:16:16 PM, Ray <ray at solarray.com> wrote:
I would look at Diesel Locomotive Cable DLO, which is usually dual rated RHH/RHW-2 for us non locomotive folks. 2000 v rated. Its pretty easy to work with, flexible, but has a 2nd inner liner that gives it the higher volt rating. Its also usually tinned conductors too.

https://www.awcwire.com/productspec.aspx?id=dlo [https://www.awcwire.com/productspec.aspx?id=dlo]
Ray Walters Remote Solar 303 505-8760
On 8/1/20 7:09 AM, Kirk Herander wrote:

I need to spec battery cable for a nominal 850 vdc LFP bank. Several brands of power cable list their rating at a dual 600/1000v. it is my understanding that to be listed in this manner, the cable must pass a test apply of over 600v for a short period without breakdown. But under normal operation IMO, the voltage is not to exceed 600v. And this test is done with AC voltage, not DC.

"UL 1277: Power and Control Tray Cable

UL 1277, the standard for electrical power and control tray cable, was recently updated, allowing manufacturers with UL approved tray cable to market their product as 600V/1kV rated. To be dual rated, products must use a recognized 1kV rated conductor and pass a higher voltage AC Hipot test on the completed cable. This test requires each insulated conductor in finished cable to withstand a specified voltage range for one minute without breakdown. If a product passes the AC Hipot test, it is suitable for 1kV use."

Am I getting this right? And If so, one should not use this 600/1000v wire if normal operating voltage is above 600v as is my case? Proper rating should be dual 1000/2000v like PV wire?

What do you experienced high voltage battery gurus use in my application? Thanks.

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