Ground Connections; Timeprovider 5000 Power Connections; Universal Ground Symbol - Symmetricom TimeProvider 5000 User Manual

Chapter 2 Installing
Making Ground and Power Connections

Ground Connections

Frame ground connections are made using the M4 Grounding Terminal Stud
located on the left side of the front panel of the unit. This stud is marked with the
universal ground symbol, as shown in
Figure 2-14. TimeProvider 5000 Power Connections
Figure 2-15. Universal Ground Symbol
After installing the TimeProvider 5000 into the rack, connect the chassis to the
proper grounding zone or master ground bar. Run a 16 AWG green/yellow-striped
insulated wire from the TimeProvider 5000 grounding terminal to the Earth Ground
on the rack. The rack grounding method is below.
Recommendation: Although there are a number of methods for
connecting the equipment to earth ground, Symmetricom
recommends running a cable of the shortest possible length from the
ground lug to earth ground.
1. Crimp the customer-supplied UL listed Ring Lug to one end of the 16 AWG wire
and connect it to the ground terminal on the left side of the front panel using the
supplied M4 Kept machine nut. The surface of the TimeProvider 5000 Earth
grounding terminal must be clean of contaminants and oxidation.
2. Crimp the appropriate customer-supplied UL listed Ring Lug to the other end of
the 1 mm² / 16 AWG green/yellow-striped wire. Remove the paint and sand the
area around the screw hole to ensure the proper conductivity. Coat the
connection with an electrically conductive antioxidant compound such as
Kopr-shield spray. Connect this Ring Lug to the rack with appropriate customer
supplied screws and external star lock washers.
3. Using a digital voltmeter, measure between the ground and chassis and verify
that no voltage exists between them.
60 TimeProvider 5000 User's Guide
Figure 2-15.
098-00028-003 Revision A – June, 2011