Section 49 – Signals, Lighting and Electrical Systems
12/1/03
49.16
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. One single-pole, 277-volt alternating current branch circuit breaker for control circuit
with 15-ampere trip and a rating of 14,000 amperes AIC at 277/480 volts. Breaker
shall be Westinghouse Quicklag GHC or approved equal.
3. Minimum six single-pole, 277-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.
4. Minimum two 3-pole, normally open, 60-ampere mercury displacement lighting
contactors. Coil voltage shall be 277 VAC, 60 cycle. Mercury displacement lighting
contactors shall be Mercury Displacement Industries (MDI), Part Number 360NO-
277V, 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.E Unmetered Service with Encapsulated Step-Down Transformer (277/480
Volt to 120/240 Volt)
The unmetered electrical service will be served from SMUD facilities as shown on the Plans.
Unless otherwise specified, service shall be wired for 277/480 volts, four-wire and three phase
as shown on the Plans.
New service enclosures shall be supplied and installed as shown on the Plans.
The service enclosure shall be fabricated in accordance with the dimensions shown on
Standard Drawing 5-11.
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 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. 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 ten (10) 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. One single-pole, 120-volt alternating current branch circuit breaker for receptacle
with 20-ampere trip and a rating of 10,000 amperes AIC at 120/240 volts. Breaker
shall be Westinghouse Quicklag C or approved equal.



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