Service manual

STP 11-25R13-SM-TG
T - 10
o. Inspect for worn spots, breaks, cracks in covering, and condition of connectors including mating
with cable and bent or broken pins. Remove power before connecting or disconnecting cables,
especially power-carrying cables.
p. X-ray hazard may come from electrical equipment with over 10,000 volts.
(1) The local Radiological Protection Officer (RPO) will be requested to determine if X-rays are
produced and the extent of the hazard. Film badges will be worn when required by AR 40-14.
(2) Devices that produce an X-ray hazard will be labeled to warn personnel of this hazard.
q. The principal hazards of battery-charging operations are acid burns during filling, back strains
from lifting, and hydrogen explosions.
(1) Battery-charging personnel should wear acid-proof gloves, aprons, and rubber boots with
nonslip soles during filling operations. Splash-proof goggles should be worn when around charging
batteries to protect against sprayed electrolyte.
(2) Caution should be exercised to prevent arcing while batteries are being charged tested, or
handled. Tools and other loose conductors should not be stored in such a position that they may fall on
batteries and cause a short circuit that, in turn, could cause a serious burn or explosion.
(3) When lifting large storage batteries, use a mechanical aid, such as a winch, to prevent strains
or hernia.
(4) Many batteries, such as the lead-acid battery, contain a strong acid electrolyte; others, such as
the silver-zinc and nickel-cadmium, contain an alkali solution. If electrolyte, acidic or alkaline, spills on
skin, immediately flush the skin with large quantities of water. This is especially important if the eye is
involved as even a slight delay can mean the difference between an incident and loss of sight.
(5) A deluge-type eyewash and/or shower shall be provided in a readily accessible location. The
eyewash shall be easy to operate by a temporarily blinded person and capable of functioning under all
weather conditions; the eyewash should be tested monthly.
(6) All battery-charging operations shall be performed in a well-ventilated area.
r. Carefully observe the CAUTION and DANGER signs located in, and on, your equipment.
These signs are provided to warn you of lethal voltages that may be contacted in the area:
(1) CAUTION signs are yellow and black and are used to warn of voltages from 70 to 500 volts and
currents over 25 amperes.
(2) DANGER signs are red, white, and black and are used to warn of voltages from 500 volts.
s. Do not remove built-in guards and barriers that protect dangerous voltages inside the
equipment from accidental contact. These guards are usually made of heat-shrink tubing, black or clear
plastic, or a silicone sealant (RTV). If a guard must be temporarily removed to test a circuit, replace the
guard when maintenance is completed.
t. Some equipment which have dangerous voltages exposed internally has interlocks on access
doors to remove power when the doors are open.