A document obtained by the Electrical Trades Union shows an an additional 500 workers lose their jobs on top of the 182 that Essential Energy last month announced would be cut from their workforce this year.

The Electrical Trades Union (ETU) said the latest revelation highlighted the importance of urgent political action to develop a practical plan to save these jobs across regional NSW.

Since 2012, the workforce at Essential Energy has nearly halved as more than 2000 jobs have been lost, drastically reducing the number of skilled front-line workers available to respond to blackouts, storm damage, or other major incidents.

The government-owned company operates electricity poles and wires across 95 per cent of NSW.

ETU secretary Justin Page said the union was alarmed by the revelation that the current round of job cuts were just the beginning, with one-in-five workers at risk of losing their jobs in the coming years.

"Essential Energy has already been cut to the bone, we've seen the workforce almost halved in recent years and dozens of depots shut, so to discover that hundreds more jobs are on the line is alarming," he said.

"With one-in-every five workers facing the chop, there is no question that regional communities will be devastated and service delivery will be greatly impacted.

"For towns already struggling with drought, the loss of these skilled jobs - forcing many families to move away - will have devastating flow-on effects on the local economy."

The union has written to Essential Energy chief executive officer John Cleland outlining a series of proposals that provide alternatives to job losses. These include:

The ETU has also provided a written briefing to NSW Deputy Premier John Barilaro outlining alternatives to job cuts.

"Our members have been extremely grateful for the supportive comments made by Mr Barilaro and many of his National Party colleagues, but those words need to be followed up with tangible actions if we're going to save these jobs," Mr Page said.

"We believe there are viable options available to Essential Energy that can avoid these cuts, but they will require a united effort from the company, workers, their unions, the broader community, and elected representatives if we are going to save these jobs.

"We also want to work with the NSW Government to find a longer-term solution to the current system where the Australian Energy Regulator imposes arbitrary and draconian budget cuts, with little regard for the impacts on workers or their local communities."

Essential Energy employees or their family members who require crisis support are urged to contact Lifeline 13 11 14.