Interior Lighting System Description. The interior lighting system provides both normal and emergency
lighting in the deckhouse ROWPU space, dayroom, workshop, and voids. The normal lighting system is illustrated in
Chapter 1. Power is provided by the service generator, auxiliary generator, or shore power. ROWPU space and void
lights are operated from their corresponding lighting panels by closing circuit breakers. Dayroom and workshop lights
are operated and controlled from bulkhead-mounted rotary switches. The ROWPU space port and starboard doors and
dayroom door to the weatherdeck are each equipped with an interlocking switch that automatically turns off these lights
when one of these doors is opened.
In the event of normal power loss, an inverter automatically converts 24 Vdc battery bank power to 120 Vac power.
This power is supplied to the emergency panel for emergency lighting and for communications.
Emergency lighting consists of ) fluorescent and red incandescent lights and communications power consists of
marine radio and telephone system.
A green lamp (Barge 1) or blue lamp (Barges 2 and 3), located on the forward
panel of the switchboard, indicates that emergency power from the battery bank is available. An emergency light switch
is located on the switchboard and next to each door to the weatherdeck so that emergency lights can be readily turned
Table C-1. Preventive Maintenance Checks and Services for Lighting System
B - Before
D - Daily
Q - Quarterly
D - During
W - Weekly
S - Semiannually
A - After
M - Monthly
A - Annually
Item to be
Check for and have repaired
D W M Q S A
or adjusted as necessary
Be sure that electrical power is OFF before
performing any maintenance on electrical
systems. Redtag appropriate switches and
circuit breakers with: "WARNING - DO NOT
ACTIVATE. REPAIRS BEING MADE. "
Check for damaged, loose, or frayed
cables and loose connections. Repair,
replace or tighten as necessary.
Check for loose or missing securements
and fasteners. Tighten and replace as
Clean lighting panels and switches with
dry, lint-free cloth or vacuum cleaner.
Check for burned out bulbs. Replace as
Remove rust and corrosion. Touch up
paint in accordance with TB 43-0144 as
necessary. Do not paint threads or labels.