Yes, pool lights and skimmers generally need to be grounded with a separate bare ground wire, even if there's no visible metal lug or ground clamp directly on them. Here's why: Safety

The primary reason for grounding is to protect people from electrical shock. In a pool environment, electricity and water create a very dangerous situation.

Potential for Conductivity

Even if a skimmer or light housing appears to be non-conductive (e.g., plastic), there could be conductive parts inside (e.g., the light fixture within the housing, the motor in the skimmer). A fault (short circuit) could energize these parts, creating a lethal hazard.

Bonding vs. Grounding

It's important to distinguish between bonding and grounding in pool contexts. Bonding connects metallic components (e.g., metal ladders, handrails, reinforcing steel in the pool shell) to create an equipotential grid. This helps to equalize the voltage potential across the pool area, reducing the risk of shock if someone touches two different metallic objects. Grounding provides a direct path for fault current back to the electrical panel, tripping the circuit breaker and cutting off power.

Code Requirements (NEC)

The National Electrical Code (NEC) has specific requirements for grounding and bonding of pool equipment. These requirements are designed to minimize the risk of electrical shock in and around the pool. While the exact requirements can vary depending on the edition of the NEC in force in your jurisdiction and the specific type of equipment, the general principle is that all metal parts and potentially conductive parts of pool equipment must be bonded and/or grounded.

Light Niches

Pool lights typically reside in niches, which are often metal or have metallic parts. These niches must be bonded and grounded. Even if the light fixture itself is plastic, it's usually connected to the niche.

Skimmers

While skimmers are often plastic, the skimmer motor (if applicable) needs to be grounded. If there's an electrical connection to the skimmer (e.g., for an automatic skimmer cleaner), it likely needs grounding.

GFCI Protection

Ground Fault Circuit Interrupters (GFCIs) are essential for pool circuits. A GFCI detects even small leaks of current and quickly cuts off power. However, GFCI protection does not replace the need for proper grounding and bonding. They work together to provide comprehensive safety.

In summary

Always consult the manufacturer's instructions for specific grounding requirements of your pool equipment. Strictly adhere to the electrical codes in your area. If you are unsure about any aspect of pool electrical work, hire a qualified, licensed electrician experienced in pool installations. Improper grounding and bonding can be fatal.

Important Note: Electrical codes and best practices change. Always refer to the most recent version of the NEC (National Electrical Code) and local codes for the most up-to-date requirements. A qualified electrician will be familiar with these codes. Flag for review