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

AC POWER CHAPTER 6: POWER SOURCES
6.2.6 CIRCUIT PROTECTION
The following requirements shall be observed when specifying and installing circuit protection devices:
NOTE: Locked-rotor starting current shall be considered when specifying breaker values for such items as the
air conditioner compressor motors and fans. Power amplifiers keyed to full power can also pose unusual
start-up loads. Such loads may also affect the type of breaker used for the circuit.
• A means of removing power from a given circuit or load without disrupting other equipment shall
be provided.
• Circuits for communication equipment shall be 15 A minimum. 20 A circuits are recommended for
each branch circuit feeding communications equipment and associated equipment.
• Branch circuit breakers for all other equipment such as lighting, heating and air conditioning shall
be rated per manufacturer specifications as per code.
• Breakers and their associated receptacles shall be uniquely labeled and correlated to the respective
power panel unless required differently for specific equipment. (See NFPA 70-2005, Article 408.4
for additional information.)
• Panel schedule shall be filled out and kept up to date. (See NFPA 70-2005, Article 408.4 and
Figure 6-3 for additional information).
FIGURE 6-3 PANEL SCHEDULE
• Circuit breakers shall be sized to protect the conductor attached to them, not the load on the circuit.
(See NFPA 70-2005, Article 240.4 for additional information.)
6-8 68P81089E50-B 9/1/05