Symmetricom TimeSource 500, User Manual

Page: 112 / 306

112
TimeSource 3500
Installation
097-72050-01 Issue 7: August 2003
S S S S S S S S S S S S S S S S S S S S S S S S S S S S S
3
Make the ground connection, following one of the methods
described below, depending on whether a ground rod is installed:
With ground rod
Solder the frame ground connection to the 6 AWG (4.115 mm)
frame ground rod run vertically on each side of the rack. Two
methods are acceptable:
• Crimp an appropriate-size spade lug (user-supplied) to the
16 AWG (1.47 mm) wire, bend the lug around the 6 AWG
(4.115 mm) rod, and solder.
• Strip enough insulation from the 16 AWG (1.47 mm) wire
to permit three complete turns around the 6 AWG (4.115
mm) rod, and solder.
Note:
When soldering, use a 25 watt soldering iron to ensure the
6 AWG (4.115 mm) rod is heated sufficiently to prevent a cold
solder connection.
If the power is not to be connected immediately, replace the
protective covers on the terminal blocks.
Without ground rod
Crimp the supplied spade lug to the 16 AWG (1.47 mm) wire, and
screw the lug to a screw hole on the rack. Remove the paint and
sand the area around the screw hole to ensure proper
conductivity. Coat the connection with an electrically conductive
antioxidant compound, for example, Kopr-Shield spray.
Crimp the supplied spade lug to the other end of the 16 AWG (1.47
mm) wire, and connect it to the
terminals on TB1 and TB2
(Figure 28).
If the power is not to be connected immediately, replace the
protective covers on the terminal blocks.