c. In replacing lamp globes in series streetlighting brackets, there is danger of an arc
developing and causing serious damage and possible injury if the spring clips in the receptacle do
not make contact. These springs may have been heated to the extent that they have lost their
temper, or for some other reason do not close the circuit when the lamp socket is pulled out.
Approved changers with at least 1.8-meter (6-foot) handles will be used for replacing lamps on
series streetlighting circuits. Workers should wear rubber gloves when removing or installing
lamps where lamp changers cannot be used.
7.11.4 Climbing Space. Maintain safe access by hanging streetlighting fixtures clear of
the climbing space. All bolts, lag screws, and other hardware used in securing the fixtures will be
7.11.5 Time Switches. When winding time switches, or working on automatic time
switches, workers should not trip the switch "on" without first pulling the transformer disconnects
or making sure that streetlighting circuits will not be energized. On time clocks with medium-
voltage connections, workers should always wear rubber gloves in winding, resetting, and
otherwise maintaining the clock.
Working on or Around Pole-Mounted Equipment. See Section 6 for various
precautions that apply to basic equipment safety for equipment that is mounted above grade. Be
aware that some state safety orders do not permit grounding of transformer enclosure cases on
wood poles, if there is a possibility that an accidental contact with bare aerial lines might occur.
Transformers connected to an energized circuit should be considered as being energized at the full
primary voltage unless they are adequately grounded.
7.12.1 Aerial Surge Arresters. Check that the permanent ground connection is intact
before any work is done. Do not climb or strap off to surge arresters. Wear eye protection when
connecting, disconnecting, or discharging surge arresters.
7.12.2 Aerial Switches and Fuses. The maintenance of switches and fuses may require
temporary line modifications to permit repairs where service continuity needs to be maintained.
Both sides of fuses should be de-energized in order for repair work to proceed. Engineering
guidance is required in preparing a step-by-step modification procedure.
7.12.3 Aerial Capacitors. Refer to Section 6 for discharging capacitors. Individual
capacitor banks should be grounded if insulated capacitor mounting racks are not used. Provide
in accordance with the manufacturer's instructions.
7.12.4 Aerial Power Transformers and Voltage Regulators. Check poles and
crossarms before installing a transformer or regulator on an existing pole. Consider that the
following transformer requirements apply to regulators where applicable. Only qualified
personnel should climb poles to fuse, inspect, and test transformers and equipment. When