A Perth business forced to correct a job advertisement calling for only 457 visa-holders to apply has again ignited debate about protectionism in WA's workforce.

The business posted an ad on Gumtree Australia on March 8 for a full-time electrician that read:

The Gumtree advertisement has since been changed- but its original contents are still available on other recruitment websites. Credit:Gumtree Australia

"##Hiring Electrician on a 457 for [job]##. Looking for a candidates interested in Solar. Should be ready to start immediately. Training provided. Requirement: 457 Visa, Valid Electrician Licence, Valid Driving Licence."

A 457 visa is provided by the Federal Government, and is valid for four years. It allows for businesses to hire migrants in specialised positions.