Universal Ground Symbol; Ground The Shelf - Symmetricom TimeProvider 100 User Manual

Rack Mounting Safety Instructions
Elevated Operating Ambient - If installed in a closed or multi-unit rack assembly,

the operating ambient temperature of the rack environment may be greater than
room ambient. Therefore, consideration should be given to installing the
equipment in an environment compatible with the maximum ambient temperature
of the TimeProvider 100, which is
Reduced Air Flow - Installation of the equipment in a rack should be such that the

amount of air flow required for safe operation of the equipment is not
compromised.
Mechanical Loading - Mounting of the equipment in the rack should be such that

a hazardous condition is not achieved due to uneven mechanical loading.
Circuit Overloading - Consideration should be given to the connection of the

equipment to the supply circuit and the effect that overloading of the circuits
might have on overcurrent protection and supply wiring. Appropriate
consideration of equipment nameplate ratings should be used when addressing
this concern.
Reliable Earthing - Reliable earthing of rack-mounted equipment should be

maintained. Particular attention should be given to supply connections other than
direct connections to the branch circuit (for example, use of power strips).

Ground the Shelf

Ground the TimeProvider 100 using the 4mm Grounding Terminal Stud on the front
of the TimeProvider 100. This Grounding Terminal is marked with the universal
ground symbol, as shown in
Figure 2-2.

Universal Ground Symbol

To make ground connections, follow these steps:
1. Connect a 4 mm² / 16 AWG green/yellow striped insulated wire from the
Grounding terminal on the TimeProvider 100 shelf to the Earth Ground on the
rack or cabinet. Connect it to the Earth Ground in accordance with Local
Electrical Codes. The surface of the Earth grounding terminal must be clean of
contaminants and oxidation.
2. Remove 1/4 in. (6mm) of the insulation from both ends of the 4 mm² / 16 AWG
green/yellow stripped wire and coat the conductor with an electrically conductive
antioxidant compound such as Kopr-shield spray. Spray antioxidant compound
on the exposed wire only.
098-00106-000 Revision A – March, 2009
.
+55 °C
Figure 2-2.
Chapter 2 Installation and Configuration
TimeProvider 100 User's Guide
Installation
29