[RE-wrenches] GEC for Micro-Inverters and ACPV Modules

[John Berdner]

Jay:

You raise an interesting question.

I believe the structure would have to be evaluated and Listed for equipment grounding (UL is working on a new Standard for this now) AND for use as a GEC (which I don’t think is possible).
Even if the WEEB was approved for use as a GEC (I still do not feel this is the case) the rail then needs to be contiguous or irreversibly spliced to the copper GEC.
I am not aware of any Listed hardware that facilitates this.
Anyone know of any ?

We also have a dissimilar metals problem irreversibly crimping or exothermic welding (the Code requirement) copper to aluminum.

Best Regards,

John Berdner
General Manager, North America

[cid:image001.jpg at 01CDF488.819E0980]

Solaredge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA  (*Please note of our new address.)
T: 510.498.3201 ext 747
M: 530.277.4894

From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of jay peltz
Sent: Wednesday, January 16, 2013 8:52 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] GEC for Micro-Inverters and ACPV Modules

Dear John and Brian

Thanks for a great discussion.

My question is:

If you used a WEEB to connect the inverter to the rail, is the rack rail listed as a GEC?
Or does it have to be listed as a GEC?

Thanks

Jay

Peltz power





Sent from my iPad

On Jan 16, 2013, at 12:09 PM, Brian Wiley <btwinfinity at gmail.com<mailto:btwinfinity at gmail.com>> wrote:
Hi John,

I don't feel that you are argumentative. I am glad for this forum and people to put forth honest opinions.

I think you just may not be aware of how the WEEB actually works. It is a type of rivet, not just a pronged thing that makes connection as part of a bolted connection.

It does use a bolt to engage the part, but the teeth on the WEEB are specially shaped. When the bolt is torqued, the teeth deform, similarly to a rivet.
The metal that it is connecting to mushrooms up around the tooth and the tooth pinches in around the metal.
This deforming action is what forms an exceptional electrical connection and also forms an air-tight seal between the part and embedded metal to resist corrosion.

If you remove the bolt, the WEEB will still be connected to the metal. You must forcibly remove the WEEB from the metal.

Hope that clears things up for you.

Best Regards,
Brian Wiley



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