System Grounding
Proper grounding helps to prevent electrical shock and to reduce electrical noise. The H9 ASD is designed to be grounded in accordance with Article 250 of the 2005 NEC or Section 10/Part One of the Canadian Electrical Code (CEC).
The grounding conductor shall be sized in accordance with Article
Table 6 of the CEC.
T h e M e t a l O f C o n d u i t I s N o t A n A c c e p t a b l e G r o u n d .
The input, output, and control lines of the system shall be run in separate metal conduits and each shall have its own ground conductor.
ASDs produce
•DO NOT install the input power and output power wires in the same duct or in parallel with each other, and do not bind them together.
•DO NOT install the input/output power wires and the wires of the control circuit in the same duct or in parallel with each other, and do not bind them together.
•Use shielded wires or twisted wires for the control circuits.
•Ensure that the grounding terminals (G/E) of the H9 ASD are securely connected to ground.
•Connect a surge suppressor to every electromagnetic contactor and every relay installed near the ASD.
•Install noise filters as required.
The Grounding Capacitor Switch and the
Grounding Capacitor
The Grounding Capacitor plays a role in minimizing the effects of leakage current through the ASD system and through ground paths to other systems. Leakage current may cause the improper operation of
— and it may cause superimposed noise on CRT screens.
The Grounding Capacitor Switch allows the user to quickly change the value of the
If using a
See pg. 5 for more information on the Grounding Capacitor Switch and pg. 16 for the location.
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