Bill,
In NJ you have to get a bonding and grounding test done every five years. The contractor who does this has a special meter that has to be checked by the state for accuracy. He then will test from point to point to measue an resisitence of 25 ohms or less. ( I believe.) Then he will issue a certificate. I as an inspector just have to do a visual once a year. I look to see that all pool equipment looks in good shape. ( No loose connectors or bonding wires, new motors etc.)
