Electricians and builders are ignoring a recall of faulty electrical wiring, leaving tens of thousands of homes at risk of fire, the consumer watchdog says.

Infinity and Olsent branded power cables remain a fire or electrocution risk in 22,000 homes and offices, according to Australian Competition and Consumer Commission, despite the products being recalled in 2014.

“It is expected in the next couple of months the cable insulation could start to crack and this may lead to electric shock or a fire if the cables are disturbed by tradespeople or home occupiers,” the ACCC said.

The insulation on the affected cables deteriorates and becomes brittle far more quickly than normal wires, especially around high heat areas such as light fittings.

They were installed in NSW homes between 2010 and 2013 and elsewhere around the country since 2011.

The recall has been hindered by lack of action from tradespeople, with retailers and suppliers reporting that some have been ignoring warnings.

“If you are an electrician or builder who installed the recalled electrical cable, you should immediately notify property owners, suppliers, and electrical safety authorities in order to have it remediated,” ACCC deputy chair Delia Rickard said.

Electricians and builders could face penalties if they don’t act immediately, she said.

Home owners who bought new properties, renovated or had electrical work done between 2010 and 2014 are also urged to have their wiring checked out by a professional.