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Re: Why An Open Neutral Kills 120V DevicesYep. I like to use a large-ish test load (such as a 1kW PAR64) applied to one or more hot legs to verify that (a) voltage drop is within reason, (b) that I'm not getting any significant voltage rise on other phases when the load is applied, and (c) that the N-G voltage increases slightly (assuming I'm not measuring at the bonding point). Note that you can't determine (b) with a circuit analyzer that only looks at one phase.
Re: Why An Open Neutral Kills 120V Devices
Yep. I like to use a large-ish test load (such as a 1kW PAR64) applied to one or more hot legs to verify that (a) voltage drop is within reason, (b) that I'm not getting any significant voltage rise on other phases when the load is applied, and (c) that the N-G voltage increases slightly (assuming I'm not measuring at the bonding point). Note that you can't determine (b) with a circuit analyzer that only looks at one phase.
