Why does Zipp recommend hardwiring over plug-in wall chargers?

Hardwiring a wall charger can help avoid nuisance tripping. Most UL-rated Level 2 chargers have built-in ground-fault protection, causing the main panel breaker to trip during a surge. However, local electrical inspectors typically mandate a Ground Fault Circuit Interrupting (GFCI) breaker for adding a 240-volt circuit for a NEMA 14-50 outlet for Level 2 plug-in charging. This duplication of GFCIs can lead to nuisance tripping. While the need for a GFCI breaker varies based on local regulations, zipp suggests using one for all installations. To prevent this issue, zipp advises hardwiring all wall chargers. Nonetheless, our installers can fit a plug-in outlet for use with a Level 2 charging cord, avoiding the same GFCI requirements.