Overhead line insulator washing

This course provides participants with the skills and knowledge to:
• carry out overhead line insulator washing principles and procedures,
• wash insulators supporting energised high voltage conductors.

Course Duration

1 ½ days

Who Should Attend

Workers who are required to carry out the washing of overhead line insulators supporting high voltage apparatus.


The prerequisites for attendance at this course are:

  • Network Authority Card (NAC)
  • Certificate III in ESI – Distribution overhead qualification
  • TLILIC2005 Licence to operate a boom-type elevating work platform (boom length 11 metres or more)
  • Licence to perform high risk work – WP (elevating work platform)

Note: All prerequisites need to be current.

Learning Outcomes

As a result of attending this course participants should be able to:

  • Identify and apply worksite safety requirements
  • Identify and prepare equipment for insulator washing
  • Inspect and maintain tools and equipment used for insulator washing
  • Test the quality of water used for insulator washing
  • Test insulators for defects
  • Wash insulators supporting high voltage apparatus

PPE/PPC & Equipment Requirements

PPE Level 1

  • Fall arrest safety harness

See the Western Power PPE Procedure for more information about the requirements


Written and practical assessments are included in the course.
Participants will need to demonstrate the required knowledge and the necessary practical skills in line with the learning outcomes.


Certificate of Attendance

Associated Authorisations

On successful completion of the course
XOHLW – Overhead Line Washing

For information on how to apply for an Authorisation, contact the Authorisations Team


To undertake this course, you may be required to provide the following plant and equipment:

  • high voltage insulated EWP fitted with high voltage earth lead and spike
  • minimum of 450 litre water tank filled with de-mineralised water
  • high pressure washing unit
  • insulated high pressure hose
  • insulated washing wand
  • silicone wipes
  • a water meter
  • a wind meter

Note: All equipment must be in-test.

This course has no current classes. Please the waiting list.