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[AMPS] Line Wiring again -- subpanels?

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Subject: [AMPS] Line Wiring again -- subpanels?
From: jimsmith@gotnet.net (Jim Smith)
Date: Tue, 9 Mar 1999 20:41:11 -0800
>I have three
>choices:
>
>1.) Do nothing and allow surges to be shunted by the arrester breakers to
>the subpanel neutral bar, where they will travel up to the house via the #8
>neutral wire to the main panel and  house ground.

    Most of the current from a lightning strike is going to follow your
tower down to the ground connection, and dissipate through the ground
system.

>2.) Ignore the manufacturer's instructions and connect the white wire on
the
>surge arrester breakers to the ground bar in the subpanel so that surges
>will be shunted to the local tower ground.

    This is actually permitted by article 280-22 of the NEC since the white
wire only conducts in the event of a surge that needs to be discharged, or
bypassed, but I wouldn't recommend ignoring the manufacturer's instructions.

>3.) Move the surge arrester breakers to the main panel, where they will
>supposedly provide protection for all circuits, and install MOVs between
the
>three service wires in the subpanel and the tower ground.

Jim Smith, KQ6UV



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