Isolated metal parts associated with a permanently installed swimming pool that are not over what dimension in any dimension shall not require bonding?

The requirement regarding isolated metal parts associated with a permanently installed swimming pool focuses on safety measures to prevent electrical hazards. The correct dimension that dictates whether bonding is necessary is four inches. Specifically, if isolated metal parts do not exceed this size in any dimension, they are typically considered to be too small to present a significant risk of contributing to shock hazards and therefore do not require bonding. This regulation is in place to ensure that only substantial metal components—those potentially involved in inadvertent electrical paths—are bonded, enhancing safety without imposing undue requirements on smaller, less consequential parts.