These cord-connected units consist of step-down, isolated, two-winding-type transformers, circuit breakers, and associated circuitry intended to supply power to low-voltage and submersible fountain lighting fixtures. The following listings are intended for power supplies used to power fountains, swimming pools, and spa luminaires operating at less than 15 V.
| Distance from Pool Edge |
Allowed Fixtures |
GFCI Required? |
UL 379 Transformer Required? |
NEC Code Reference |
| Within 5 Feet |
Only low-voltage (<15V) fixtures powered by a UP379 transformer |
No |
Yes |
NEC 680.22(B) (6) |
| 5-6 Feet |
Low-voltage & line-voltage (GFCI required) |
Yes |
No |
NEC 680.22(B) (4) |
| 6-10 Feet |
Low-voltage (<30 V) without GFCI, line-voltage with GFCI |
Line-voltage only |
No |
NEC 680.22(B) (4) |
| 10+ Feet |
No restrictions on fixture type or voltage |
No |
No |
NEC 680.22(A) (2) |
- UL 379-listed transformers are only required for fixtures within 5 feet of the pool.
- GFCI protection is required for fixtures from 5 to 10 feet if they are line-voltage (120V).
- Beyond 10 feet, normal landscape lighting rules apply with no special NEC restrictions.
