Proper MEWP Operator Training is Critical

In formal training sessions we often discuss the primary hazards related to the operation of aerial lift equipment such as boom lifts, scissor lifts and vertical mast lifts. These include tip over, fall, and collision hazards, but the danger of death or serious injury from electrocution is important enough to warrant a separate review.

Mobile Elevating Work Platforms (MEWP’s) are not electrically insulated and provide no protection from electrocution.

It is mandatory that all operators fully understand the potential for electrocution when operating these machines.

Work that needs to be accomplished near energized power sources requires common sense and planning.

There are two places an aerial lift operator can reference to assist with the planning process.

1. In the operators manual specific to the make of model of machine.
2. On decals attached to the MEWP which will identify at a minimum the required clearance you must maintain when working near energized power sources.

Decal example:

Line Voltage                            Required     Clearance

0 to 50KV                                  10 ft              3.05 m

50 to 200KV                              15 ft              4.60 m

200 to 350KV                            20 ft              6.10 m

350 to 500KV                            25 ft              7.62 m

500 to 750KV                            35 ft            10.67 m

750 to 1000KV                          45 ft            13.72 m

It is extremely important that every operator know the specific voltage of energized conductors in the work area.

DO NOT OPERATE the machine without this information!

If you don’t know the voltage of the specific electric power sources in your work area the local electric utility must be contacted.

For power lines with voltage over 1000KV, the minimum distance must be established by the utility owner or the entity in charge of operating them.

High voltage overhead power lines are most often not insulated. The operator or any part of the machine will not have to come in direct contact with an energized power source to be in extreme danger.

High voltage current can jump up to 45 feet to seek a ground.

When electric lines are present, before the job begins always contact the electric power line owner. The electric power must be disconnected or the lines must be moved and or insulated before machine operation can begin.

Additionally, operators must obey all local and governmental regulations regarding required clearance from electric power lines.

It is also very important to allow for platform movement, electrical line sway and be aware of strong or gusty winds.

If a machine comes in contact with energized power lines, keep away from the base of the machine.

All personnel on the ground or in the machine must not touch or operate the machine until power has been disconnected.

Never operate an aerial lift in stormy weather and or when there is lightning occurring.

Never use the machine as a grounding point for welding operations.

This article is not intended to take the place of a comprehensive operator training program.

Contact Alexander Equipment today to schedule your teams training.

All MEWP operators are required by federal law to be properly trained and familiarized with the specific make and model of aerial lift to be operated.