COMMENT 9-134 408.58 DC

[fmtjfw]

I'm looking for constructive criticism on the following, and if you think it is merited, support in the form of comments from you on 9-134. Thanks, Jim Williams

4 Comment:
revise the following text:

red denotes deletion

408.58 Panelboard Marking. Panelboards shall be durably marked by the manufacturer with the voltage and the current rating and the number of AC phases or DC phases ungrounded conductors for which they are designed and with the manufacturer?s name or trademark in such a manner so as to be visible after installation, without disturbing the interior parts or wiring.

5 Statement of Problem and Substantiation.

DC has no ?phases?.

 

[petersonra]

I'm looking for constructive criticism on the following, and if you think it is merited, support in the form of comments from you on 9-134. Thanks, Jim Williams

4 Comment:
revise the following text:

red denotes deletion

408.58 Panelboard Marking. Panelboards shall be durably marked by the manufacturer with the voltage and the current rating and the number of AC phases or DC phases ungrounded conductors for which they are designed and with the manufacturer?s name or trademark in such a manner so as to be visible after installation, without disturbing the interior parts or wiring.

5 Statement of Problem and Substantiation.

DC has no ?phases?.

However, it often has 2 polarities with respect to a common point.