HARBOR SYSTEM MASTER PLAN - City and Borough of Sitka

Sitka Harbor System Master Plan
Condition Inventory
The grounding system was not investigated. The only grounding components found were bonding
straps on conduits in the ramp float beneath the float. Grounding electrodes were not found, however,
they might be beneath the substations.
Shore-tie Pedestals:
The vessels are powered from at least three types of pedestals. Some are manufactured by “Marine &
Boatyard”, some by “Midwest”, and some utilizing a generic meter base integrated with a main circuit
breaker mounted to a stand. The generic type is utilized in conjunction with a “Hubbell” 100 ampere,
three phase, pin & sleeve type receptacle.
The finger floats shore-tie pedestals provide service to the vessels as follows:
Float Marine & Boatyard Midwest Generic
30A 30 & 50A 30A 30 & 50A 100A
No. 1 12 1
No. 2 22
No. 3 30
No. 4 44 2
No. 5 34 2
No. 6 30
No. 7 26 2
No. 8 20 2
No. 9 8 12 1
No. 10 10 6 1
Main 2
The 30 ampere receptacles are rated at 120 volts and protected with
30 ampere circuit breakers. The 50 ampere receptacles are rated at
208 volts and protected with 50 ampere, two pole circuit breakers.
These receptacles are all twist lock type.
The “Marine & Boatyard” shore-tie pedestals appear to be
fabricated with stainless steel enclosures and posts with the feeder
lugs located in the posts, circuit breakers above on the front, and
the receptacles on the sides. The revenue meters are digital type
with the transducers inside the enclosure and the displays on the
exterior, just below the circuit breakers. A luminaire is mounted at
the top of the post. These are duplex type shore-tie pedestals
serving two separate vessels.
The “Midwest” shore-tie pedestals are fabricated with power heads
fastened to a post. The post is configured to enclose the feeder
lugs with circuits routed up to the power heads. The power heads
include conventional utility type revenue meters, circuit breakers and receptacles. The circuit
configurations and receptacles are similar to those found in the “Marine & Boatyard” pedestals. The
post and power head enclosures are all fabricated with sheet metal that appears to be stainless steel, with
paint on the exterior. These do not include luminaires on top, but all include two power heads for
duplex service to the vessels.
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