These cord-connected units consist of 1) step-down, isolated, two-winding-type transformers, with 2) circuit breakers and 3) associated circuitry intended to supply power to low-voltage and submersible fountain lighting fixtures operating at less than 15 V.
| Distance from Pool Edge |
Allowed Fixtures |
GFCI Required? |
UL 379 Transformer Required? |
NEC Code Reference |
| Within 5 Feet |
Low-voltage (<15V) fixtures |
No |
Yes |
NEC 680.22(B) (6) |
| 5-6 Feet |
Low-voltage (<15V) & line-voltage fixtures |
Yes |
No |
NEC 680.22(B) (4) |
| 6-10 Feet |
Low-voltage (<30 V) & line-voltage fixtures |
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) |
These transformers are compliant and certified as UL-379 for Pool & Spa:
| Transformer |
UL-379 compliant? |
| LUXOR |
Yes |
| DX |
Yes |
| PX |
Yes |
| EX |
Yes |
Summary
- 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.
