Owner's manual

Argus Technologies Ltd. 010-592-C0 Rev G WC

4.7 Safety Ground

The safety ground is a two-part system. The first part is a return path for stray current back to the input breaker,

and the second is a return path from the enclosure to a second ground rod.

Typically, the safety, or utility ground, provides a return path to the input breaker or fuse panel by means of a

connection to an appropriate driven ground rod at the base of the power pole. This path must meet National

Electrical Code (NEC) as well as local codes to ensure the breaker will open, preventing unwanted current flow

from posing a hazard to service personnel.

4.8 Strike (Lightning) Ground

Lightning strikes, grid switching, or other aberrations on the power line all have the potential to cause “fast rise-

time currents” which can cause damage to the powering system. Without a low-impedance path to ground, the

current, while travelling through wires of varying impedance, can produce high voltages that will damage the

powering equipment. The most viable method available to protect the system from damage is to divert these

unwanted “fast rise-time currents” along a low-impedance path to ground. A low-impedance path to ground will

prevent these currents from reaching high voltage levels and posing a threat to equipment. The single-point

grounding system provides a low-impedance path to ground, and the key to its success is the proper bonding of

the ground rods, so the components of the grounding system appear as a single point of uniform impedance.

4.9 AC Wiring, Optional Power Cords

1. The FMPS may be supplied with an optional power cord, up to eight feet in length, equipped with a 5-15P-

type plug (as shown in Figure 2 or List 85 below).

2. If hardwiring the FMPS, discard the AC line cord by removing it from the AC input terminal block.

3. The inlet on the line cord shown here (Figure 7, List 84) is the disconnect device for systems provided with

this option:

Figure 7–Power cord options

List 84 List 85

NOTE: For use with external line cords compatible with IEC 60320 type female connections. Verify local electrical codes

and installation requirements before connection.

4. The FMPS must be permanently connected, or provided with a IEC 60309 compliant power cord set, when

installed in the following countries: Austria, Belgium, Denmark, Finland, Germany, Norway, Sweden, UK.