Understanding Power Loads
Proper power load calculation is essential for safe and efficient electrical systems.
- Current Draw The amount of current required by the electrical load.
- Wire Sizing Proper wire size selection based on current and distance.
- Voltage Drop Loss of voltage over distance in conductors.
- Circuit Protection Proper circuit breaker sizing for safety.
Design Considerations
Load Types
Consider continuous and non-continuous loads separately.
Voltage Drop
Keep voltage drop under 3% for branch circuits.
Derating Factors
Account for temperature and conduit fill.
Future Expansion
Include capacity for future load growth.
Circuit Protection Guide
- Circuit Breakers Select next standard size above calculated current.
- Wire Ampacity Must exceed circuit breaker rating.
- GFCI Protection Required for specific locations and uses.
- AFCI Protection Required for many residential circuits.