Section 49 – Signals, Lighting and Electrical Systems
12/1/03
49.15
13. One single phase transformer rated at 2 KVA. Primary shall be 480 volts and
secondary shall be 120/240 volts. This transformer to be unmetered and shall
provide the power for intersection safety lighting and the control circuit.
14. Provide primary transformer protection per the NEC.
49-2.11.C Unmetered Service (120/208 Volt, 120/240 Volt)
The unmetered electrical service will be served from SMUD facilities as shown on the Plans.
Service shall be wired for 120/208 volts or 120/240 volts, three-wire and single phase as shown
on the Plans. The Contractor shall connect the luminaires to the circuits shown on the Plans.
New service enclosures shall be supplied and installed as shown on the Plans.
The service enclosures shall be fabricated in accordance with the dimensions shown on
Standard Drawing 5-10.
Mounted in each unmetered service enclosure shall be the following equipment:
1. One, 2-pole, 120-volt alternating current main breaker with 100-ampere trip and a
rating of 10,000 amperes AIC at 120/240 volts. The main breaker shall have an
internal common trip. Each pole shall have individual "ON-OFF" control and handle
tie for common operation. Breaker shall be Westinghouse Quicklag C or approved
equal.
2. One single-pole, 120-volt alternating current branch circuit breaker for control circuit
with 15-ampere trip and a rating of 10,000 amperes AIC at 120/240 volts. Breaker
shall be Westinghouse Quicklag C or approved equal.
3. Minimum six single-pole, 120-volt alternating current branch circuit breakers for
street lighting, each sized per the Special Provisions and the Standard Drawings
(minimum 30-ampere trip), and with a rating of 10,000 amperes AIC at 120/240 volts.
Breakers shall be Westinghouse Quicklag C or approved equal.
4. Minimum two 3-pole, normally open, 60-ampere mercury displacement lighting
contactors. Coil voltage shall be 120 VAC, 60 cycle. Mercury displacement lighting
contactors shall be Dayton Electric Manufacturing Co., Model Number 3X753E, or
approved equal.
5. One oil tight "Hand-Off-Auto" selector switch.
6. One solid copper neutral bus.
7. Incoming terminals (landing lugs).
8. Solid neutral terminal strip.
9. Terminal strips for conductors within the cabinet.
49-2.11.D Unmetered Service (277/480 Volt)
The unmetered electrical service will be served from SMUD facilities as shown on the Plans.
Service shall be wired for 277/480 volt, four-wire and three phase as shown on the Plans. The
Contractor shall connect the luminaires to the circuits shown on the Plans.
New service enclosures shall be supplied and installed as shown on the Plans.
The service enclosures shall be fabricated in accordance with the dimensions shown on
Standard Drawing 5-10.
Mounted in each unmetered service enclosure shall be the following equipment:
1. One 2-pole, 277/480-volt alternating current main breaker with 100-ampere trip and
a rating of 14,000 amperes AIC at 277/480 volts. The breaker shall have an internal



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