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<blockquote data-quote="Tim McCulloch" data-source="post: 108392" data-attributes="member: 67">Re: Cam Lock Ground OrientationFor Bennett- if you read the Code, the mechanical interlock (actual ability to connect only the &quot;correct&quot; cable, one at a time) like Posi-Lok is the first and preferred way.&nbsp; Posi-Loks suck.&nbsp; I&#039;ve seen them on touring feeder a couple of times in 15 years, and that was on the feeder between generators and switch gear.&nbsp; Architects specify them because they&#039;re absolutely, positively NEC 520/525 compliant.&nbsp; Every venue that has them ends up building or buying Posi-to-cam tails.Reversing the grounded conductors makes it impossible to immediately mate a phase leg to neutral or ground, effectively meeting the actual need of the Code.Finally, posting a warning notice that requires the use of &quot;Authorized Personnel&quot; and specifies the connection and disconnection order will also suffice (unless the local AHJ requires the other measures).@ Josh - Yepper.&nbsp; I train our employees to meter the tails before connecting the feeder; turn the switch off and verify that the other end of the feeder is connected, and then mate the tails to feeder.&nbsp; Re-verify that the other end of the feeder is properly connected to the appropriate device and that the device&#039;s master breaker or all branch circuit breakers are off.&nbsp; Throw the big switch and then meter the voltages at the device.&nbsp; Once determined to be correct, loads may be switched on.This is one way you find &quot;stinger&quot; or &quot;high&quot; phase legs and other undocumented surprises, or find out your electrician is color blind and that green and red look the same to him...</blockquote>

[QUOTE="Tim McCulloch, post: 108392, member: 67"] Re: Cam Lock Ground Orientation For Bennett- if you read the Code, the mechanical interlock (actual ability to connect only the "correct" cable, one at a time) like Posi-Lok is the first and preferred way. Posi-Loks suck. I've seen them on touring feeder a couple of times in 15 years, and that was on the feeder between generators and switch gear. Architects specify them because they're absolutely, positively NEC 520/525 compliant. Every venue that has them ends up building or buying Posi-to-cam tails. Reversing the grounded conductors makes it impossible to immediately mate a phase leg to neutral or ground, effectively meeting the actual need of the Code. Finally, posting a warning notice that requires the use of "Authorized Personnel" and specifies the connection and disconnection order will also suffice (unless the local AHJ requires the other measures). @ Josh - Yepper. I train our employees to meter the tails before connecting the feeder; turn the switch off and verify that the other end of the feeder is connected, and then mate the tails to feeder. Re-verify that the other end of the feeder is properly connected to the appropriate device and that the device's master breaker or all branch circuit breakers are off. Throw the big switch and then meter the voltages at the device. Once determined to be correct, loads may be switched on. This is one way you find "stinger" or "high" phase legs and other undocumented surprises, or find out your electrician is color blind and that green and red look the same to him... [/QUOTE]

Verification