Disclaimer

The calculators, charts and guides on this site are provided for planning and education. They are not professional engineering, electrical or construction advice and do not replace the electrical code adopted in your area, the instructions of the equipment manufacturer or the judgment of a licensed electrician.

Local codes and amendments differ. Installation conditions such as ambient temperature, bundling of cables and the rating of terminations change the result. Have electrical work designed, permitted and inspected as your local authority requires.

Material quantities, weights and coverage are estimates. The weight of a cubic yard of stone, sand, soil or mulch differs between suppliers and changes with moisture and compaction, and the published values used here show a range. Confirm the weight per cubic yard and the quantity with your supplier before ordering, and follow the specifications of the manufacturer or designer for layers under driveways, paths and pavers.

This site is not affiliated with or endorsed by NFPA, ICC, any standards organization, or any agency, university or company whose published documents it cites.