i. The extensive use of barriers and interlocks as a part of the network protectors,
provides greater safety to maintenance personnel. Keep barriers in place and immediately
replace any that have been broken. Although barriers and interlocks are provided,
insulated tools and/or insulated gloves are required to remove the rollout unit from the
enclosure, and to remove fuses, or at the initial installation of the network protector on the
j. Before performing maintenance or removing a network protector from service,
de-energize the network protector.
6.11.3 After Network Protector Maintenance
On the first trial operation, or on the first operation of a network
protector after repairs have been made on its mechanism or circuit
breaker, the door of the network protector should be closed,
when practicable. Always have a network protector blocked
open, when installing or removing secondary fuses, to prevent the
possibility of the network protector closing automatically.
Storage Battery Safety
Electric storage batteries emit hydrogen and oxygen, particularly
while being charged. This forms a highly explosive mixture.
a. Storage batteries are most often lead acid type but nickel-cadmium batteries are
also used. Flood-cell (vented) technology or valve-regulated technology may also be
installed. These different types have different charging/discharging characteristics and
their hazardous emissions require different handling operations. NAVFAC MO-200,
Chapter 14 covers their maintenance and operating requirements.
b. Smoking or the use of any open flame, such as torches, will not be permitted
around batteries. When soldering or lead burning is done, the battery room should be well
ventilated, the battery cell vent plugs should be removed, and the excess gas above the
electrolyte should be blown out of those cells near the work area.
c. Cleaning batteries or terminals with brushes or other devices that may short out
the cell will not be permitted. (The ignition of the hydrogen-oxygen mixture in cells by a
spark from a short on terminals has caused cells to explode).
d. When making up electrolyte for storage batteries, a worker should always pour
acid into the water. The reverse may cause an explosion.