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MERLIN LEGEND Communications System Release 6.1
Installation
555-661-140
Issue 1
August 1998
Installing the Control Unit
Page 2-11
AC Power and Grounding
■ Because equipment can be located throughout a building, the
National Electrical Code requires that the ground point for the
central office trunk protector be bonded to the AC power ground
as shown in Figure 2–3.
■ The AC outlet and the single-point ground bar must be properly
grounded as shown in Figure 2–1 and Figure 2–3.
■ Each power supply in the control unit must be connected to the
single-point ground bar by a #12 AWG or a #14 AWG solid copper
wire. Figures 2–1 and 2–3 show this connection.
■ This wire run should be as short as possible, preferably within 5 ft.
(152 cm), not to exceed 10 ft. (305 cm). See “Approved Grounds,”
later in this chapter, for more information.
■ The AC outlet must be connected to the 147A protector with a #12
AWG or a #14 AWG solid copper wire.