What Is The Minimum Burial Depth For UF Cable?
March 9, 2006
Q: What is the minimum burial depth for UF cable that is used to feed outdoor lighting along the driveway for a one-family residence? The cable will be run under a concrete walkway, lawn area and paved driveway for a two-car garage.
A: Although Underground Feeder and Branch-Circuit Cable (Type UF) is not suitable for installation where it is subject to physical damage, if it is buried in accordance with the minimum burial depths mentioned in Table 300.5, you should have a Code-compliant installation.
The minimum burial depth under lawn areas is 24 inches. This dimension decreases to 18 inches under a concrete walkway and at the paved driveway. However, these burial depths can be decreased to 12 inches where the lighting branch circuit overcurrent protection is 15 or 20A, the voltage is 120 and the branch circuit is protected by a ground-fault circuit-interrupter. This reduction in burial depth is permitted under column 4 of Table 300.5.
Do you need assistance with your electrical wiring project? Please visit my DIY Electrical Wiring Help from a Master Electrician page. Where I provide electrical wiring tips, expert electrical advice, answers to your electrical questions and electrical consulting & design services over the phone, via instant messenger or via email.
- How Deep Do I Bury UF Cable To My Post Light?
- Minimum Burial Depth for Rigid Metal Conduit
- Minimum Depth Requirements for Installing Underground Electrical Circuits
- Answers to Electrical Questions About Installing a Receptacle for a Bug Zapper, Wiring a Generator and Transfer Switch and Installing a Dryer Cord
- Connecting The Grounding Electrode Conductor To Rebar