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AC POWER SPD REQUIREMENTS CHAPTER 7: SURGE PROTECTIVE DEVICES
Electrical meter and main
service disconnect are
located on the cabinet
exterior, an adjacent
pedestal or utility pole.
See Notes 1 and 2.
Main Service
Disconnect
Meter
Utility Feed
AC
240/120 Single Phase
To Alarms Panel
(Recommended)
SPD
(Surge Suppressor)
Type 1 or 2 ,
optional
Utility
Panelboard
See Note 2
All Loads
Stand alone Pole or Pad mounted equipment
cabinet with single Repeater, Base Station,
Receiver or Control Station.
Type 3 SPD required
for all equipment
loads.
See Note 6
NOTES: 1. The main service disconnect may be located outside the equipment pole or pad mounted cabinet, typically on the cabinet
exterior, an adjacent pedestal or utility pole.
2. The Main service disconnect may be a part of the Utility Panelboard.
3. When installed the Type 1 or Type 2 SPD shall be installed per the manufacturer's installation instructions.
4. All conductors between the SPD and the associated disconnecting device shall be as short as possible and routed
together with a minimal number of bends or angles of less than 90 degrees.
5. The SPD disconnecting devices should be installed in the top most space available in the Utility Panelboard.
6. Installation of Type 3 SPDs on each load is required unless a Type 1 SPD is installed on the Utility Panelboard.
FIGURE 7-17 SPD INTERCONNECT BLOCK DIAGRAM ‘P’
7-26 68P81089E50-B 9/1/05