The city’s public hospitals have been barred from laying off about 150 electricians, carpenters and laborers — for now.

A Manhattan judge ruled Wednesday that the Health and Hospitals Corp. “failed to employ a sound methodology” in deciding to let go about half its laborers and one-third of its electricians and carpenters.

The ruling sends the matter back to the hospital agency for further evaluation.

The carpenters’ lawyer, Robert Stulberg, called the decision a victory for the tradespeople and the hospitals’ patients alike.

The workers said the layoffs could jeopardize patients because the jobs involve fire control and other safety activities.

The HHC said that it needed to close a $1.2 billion budget gap, and that other workers could cover the tasks.