standards and guidelines for communication sites - Radio And ...

STANDARDS AND GUIDELINES FOR COMMUNICATION SITES AC POWER SPD REQUIREMENTS
• Each device shall have an indicator lamp visible from the front of the device showing that the
module has power applied and that the protection integrity has not been compromised. Alarm relay
contacts to remotely report device failure may be offered but are not required.
• The minimum pulse life or durability requirements and the voltage protection level shall be as
specified in Table 7-4 for the respective Maximum Continuous Operating Voltage (MCOV) listed.
• Installation of Type 3 SPDs on each critical load is recommended in locations highly vulnerable to
transient surges or lightning activity when the critical load is located greater than 3 m (10 ft.) of
conductor length from the Type 1 SPD. Where the load is located between 3 to 15.2 m (10 to 50 ft.)
of conductor length from Type 1 devices a Type 3 device is optional. Where the load is located
greater than 15.2 m (50 ft.) of conductor length (7.6 m (25 ft.) of circuit length) from the Type 1
device, a Type 3 device is highly recommended. (See Table 7-3.)
TABLE 7-3 SPD REQUIREMENTS BASED ON CONDUCTOR LENGTH
0 - 3 m
(0 - 10 ft.)
Conductor Length *
3 - 15.2 m
(10 - 50 ft.)
Type 1 Required Type 1 Required
Type 3 Optional
> 15.2 m
(>50 ft.)
Type 1 Required
Type 3 Highly recommended**
* Lengths shown denote CONDUCTOR length. The CIRCUIT distance is ½ of conductor
length shown.
**In applications for standalone pole- or pad-mounted cabinets, where an SPD or a Type 2 SPD is not
installed on the Utility Panelboard, Type 3 devices shall be installed on all loads.
• The device shall be UL 1449, 2nd Edition listed. Devices may also conform to the international CE
certification mark, and tested to clause 7.10. A test report from a Nationally Recognized Testing
Laboratory (NRTL), NAVLAP or A2LA, or a Certified UL client testing data laboratory detailing
the procedures used, and the results obtained shall be made available to the Motorola National Site
Design and Integration Process and Product Manager.
• Each multiple receptacle outlet strip type device incorporating telephone or data circuit protection
shall be UL 1449 and UL 497A listed or recognized. Devices may conform to the international CE
certification mark.
68P81089E50-B 9/1/05 7-31