Hospital workers in Auckland are stopping work for two hours this morning.
It's the second of a three-day strike across three district health boards.
They're protesting over a planned reduction to weekend penal rates for new staff and an increase to patient services.
PSA assistant secretary Warwick Jones says workers just want a level playing field.
"Even if it is only applied to new workers coming in, it's totally unfair having people working alongside one another where one has a higher weekend rate than another."
Medical physicists from six DHBs will also walk off the job for a week later this month.