NZNO lead advocate David Wait said the vote was very high and members clearly remained resolute about ongoing strike action.
Last month 30,000 nurses walked off the job when contract negotiations broke down.
Union members have just submitted their votes on whether to strike again.
This follows continued mediation between nurses and the DHBs.
Health Minister Andrew Little had said he was satisfied there had been constructive discussion between the two parties.
"But I'm acutely aware that the centrepiece really of what's going to fix the problem is what we do on the pay equity question, that's been around for three years now and I've asked officials to accelerate that work," Little said.
- RNZ