In Class II locations, which method is permissible for bonding?

In Class II locations, which are defined as environments where flammable vapors, gases, or dust may be present, proper bonding is essential to prevent the potential buildup of static electricity that can lead to ignition. Bonding jumpers with proper fittings are a permissible method because they create a conductive path between conductive parts, ensuring that any static charge is safely dissipated to the ground.

Using bonding jumpers is effective and often required by electrical codes in environments where safety is paramount. These jumpers must be installed according to relevant standards, ensuring they are robust and appropriately connected to maintain low resistance paths.

Other methods, such as using permanent wiring alone or insulated cables, may not provide the necessary level of safety in these hazardous locations, as they could fail to offer efficient grounding or bonding paths for dissipating electrical charges. Not bonding at all poses a significant risk in these areas, as it would leave the system vulnerable to the dangers associated with static electricity and potential ignition sources. Thus, bonding jumpers with proper fittings are the correct choice for ensuring safety in Class II locations.