Section 49 – Signals, Lighting and Electrical Systems
12/1/03
49.14
New service enclosures shall be supplied and installed as shown on the Plans.
The service enclosures shall consist of a separate metering section and a service section.
The metering section shall be complete with SMUD-approved three-phase meter socket, steel
socket cover and manual circuit closing device.
The meter section shall have a removeable cover with the top and front sections welded
together so that it is rain tight and padlockable. The meter section shall include provisions to
allow SMUD to lock and seal the meter section.
The service enclosure shall be fabricated in accordance with the dimensions shown on
Standard Drawing 5-9.
Mounted in each metered 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 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 GHC or
approved equal.
2. Minimum six, single-pole, 277/480-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 14,000 amperes AIC at 277/480 volts.
Breakers shall be Westinghouse Quicklag GHC or approved equal.
3. 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.
4. One single-pole, 120-volt alternating current branch circuit breaker for traffic signals,
with 50-ampere trip and a rating of 10,000 amperes AIC at 120/240 volts. The
breaker shall be Westinghouse Quicklag C or approved equal.
5. One 2-pole, 120-volt alternating current branch circuit breaker for intersection safety
lighting, with 15-ampere trip and a rating of 10,000 amperes AIC at 120/240 volts.
The breaker shall have an internal common trip. Each pole shall have individual
“ON-OFF” control and handle tie for common operation. The breaker shall be
Westinghouse Quicklag C or appproved equal.
6. Minimum three, 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.
7. One oil tight "Hand-Off-Auto" selector switch.
8. One solid copper neutral bus.
9. Incoming terminals (landing lugs).
10. Solid neutral terminal strip.
11. Terminal strips for conductors within the cabinet.
12. One single-phase transformer rated at 5KVA. Primary shall be 277 volts and
secondary shall be 120volts. This transformer to be metered and shall supply the
traffic signal power.



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