Labor promises 480 extra NSW cops

A NSW Labor government would employ 480 extra police officers in its first term, Opposition Leader Luke Foley has announced.

Both major parties have already committed to putting 180 new cops on the beat by August this year.

"The coalition parties go further to a total of 310 - [but] Labor goes even further," Mr Foley told reporters on Sunday.

Labor has promised to focus on understaffing in key areas including western Sydney, Wagga Wagga, Nowra and northern NSW if it wins the March 28 state election.

But Mr Foley added: "We'll be guided by the police commissioner rather than making any political judgments of our own about where to deploy officers."

The opposition leader said the policy was "affordable".

Salary costs would reach nearly $55 million, with just under $20 million to go on associated costs including training.

Labor has also promised $100 million for a Police Technology Fund.

But voters won't see detail on the costings until a few days before polling day, when the Parliamentary Budget Office reports on Labor's expenditure promises.

With voters slow to warm to Premier Mike Baird's plan to lease out the state's electricity networks, Mr Foley emphasised that Labor's promises would instead rely on revenue from retaining the so-called poles and wires.

"Labor's plan for the state involves using the profits from our electricity network to keep delivering - more police, more paramedics, more nurses and more teachers," Mr Foley said.