TO: NECA 400-200X ANSI Canvass Participants FROM: Billie Zidek ...
TO: NECA 400-200X ANSI Canvass Participants FROM: Billie Zidek ...
TO: NECA 400-200X ANSI Canvass Participants FROM: Billie Zidek ...
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<strong>NECA</strong> <strong>400</strong>-<strong>200X</strong> – Reballot Draft<br />
3.9 Ground Bus Splice Connections<br />
Ground bus splice kits are provided by the switchboard manufacturers when<br />
more than one section is required to be electrically connected (see Figure 6).<br />
Proper installation of ground bus splice connections is essential to providing a<br />
low-impedance path to ground for temporary current resulting from phase-toground<br />
faults.<br />
a) Splice kits may come in separate boxes, be installed on the ground<br />
bus of one or more sections, or be stored inside the switchboard<br />
sections.<br />
b) Follow the proper sequence of hardware installation, as specified in the<br />
manufacturer’s installation instructions. Install conical washers such<br />
that their convex side is against the nut.<br />
c) Torque the splice bolts to the recommended value. Mark each torqued<br />
connection with a permanent marker.<br />
3.10 Grounding and Bonding<br />
3.10.1 Ground systems – service-entrance switchboards and<br />
switchboards used on separately derived systems<br />
NEC Section 250.64 describes complete grounding requirements for grounded<br />
separately derived systems.<br />
a) Run a grounding electrode conductor from the grounding electrode at<br />
the installation site to the grounding electrode conductor connection,<br />
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