6 December 2006
Including change 1, 7 December 2006
12-2.1.4 In many cases, contract personnel or specially trained workers will repair
complex controls and special equipment.
Battery Room Hazards. The battery safety rules provided in Paragraph 9-8
apply to low-voltage systems.
Fire Alarm Systems. Maintaining fire alarm systems with their appropriate
safety requirements requires special training and must be in accordance with UFC 3-
600-02, Operations and Maintenance: Inspection, Testing and Maintenance of Fire
Protection Systems. Workers must have completed one or more of the following
certifications or specialized training.
Factory trained and certified, or
Certified by the National Institute for Certification in Engineering
Technologies (Fire Alarm Systems), or
Certified by the International Municipal Signaling Association (Fire Alarm
Certified by state or local authority, or
Trained and qualified by an organization listed by a nationally recognized
testing laboratory for the servicing of fire alarm systems.
. Adjustable-speed motor controllers, frequency
converters, and uninterruptible power supply (UPS) equipment are complex solid-state
devices that must generally be maintained by manufacturers or specially trained
contract personnel. Facility personnel are not normally trained for such work. Even
after initial training, maintenance work is usually done on such an infrequent basis that
workers must not be considered qualified. Facilities with these installations must
contain cautionary labeling to warn workers of the electric shock dangers involved in
operating and maintaining these types of equipment.
Low-Voltage Work Precautions.
12-2.5.1 Assume all parts of an electric circuit are energized until proven otherwise.
Personally inspect circuits before starting work to be sure circuits are deenergized.
12-2.5.2 Use only insulated hand tools when working on equipment where the tool
could contact an energized source of 50 V or higher.
Older plastic or rubber coated tools are often not certified by the
manufacturer for insulating ability, and the coating is only provided as a