Load Calculator

Add equipment and calculate total power requirements

Total Load Summary

Total Watts: 0 W
Total Amps @ 120V: 0.0 A
Total Amps @ 208V: 0.0 A
Total Amps @ 240V: 0.0 A
Total VA: 0 VA

Circuit Breaker Sizing

Calculate recommended breaker sizes using the 80% rule

Common Equipment Power Database

Click any item to add it to your load calculation

Power Amplifiers
Crown XTi 6002 1700W
QSC PLD 4.2 1300W
Crown I-Tech 4x3500HD 4000W
QSC PL380 3800W
Powered Speakers
QSC K12.2 1000W
JBL VTX V20 2500W
Meyer UPM-1P 500W
d&b Y10P 1400W
L-Acoustics KARA 3000W
Mixing Consoles
Yamaha CL5 200W
DiGiCo SD12 250W
Avid S6L-24C 400W
Yamaha QL5 150W
Lighting
Moving Head LED 300W
LED Par Can 150W
Conventional Par64 1000W
Follow Spot LED 500W

Three-Phase Load Balancing

Distribute single-phase loads evenly across three phases

Phase A
0.0 A
0 W
Phase B
0.0 A
0 W
Phase C
0.0 A
0 W

Voltage Drop Calculator

Calculate voltage drop over wire runs

Generator Sizing Calculator

Size generators for your total load with safety factors

Common Rental Generator Sizes

Small Generators
20 kVA - Small events
30 kVA - Medium events
45 kVA - Large events
Medium Generators
60 kVA - Tours/Festivals
100 kVA - Large venues
125 kVA - Festival stages
Large Generators
200 kVA - Main stages
300 kVA - Festival power
500 kVA - Large venues

Transformer Calculator

Size transformers for voltage conversion and isolation

Power Distribution Configurations

Common connector types and pin configurations

High-Current Connectors

Cam-lok 400A

L1
L2
L3
N
G

208V/480V Three-Phase Distribution

Socapex 19-Pin

Socapex 19-Pin

1
2
3
N
⏚

6 x 2.5kW Circuits + Neutral + Ground

NEMA Connectors

L6-20 (20A, 240V)

L1
L2
⏚

240V Single Phase, 20A

L21-30 (30A, 3Ø)

L1
L2
L3
N
⏚

208V Three Phase, 30A

Edison (NEMA 5-15)

Standard Edison

H
N
⏚

120V, 15A Standard Outlet

UPS Runtime Calculator

Calculate backup runtime for critical equipment

Grounding Reference Guide

Best practices for audio system grounding

Star Ground System

Star Ground Configuration

Central Ground Point:

  • Single point ground reference
  • All equipment chassis to star point
  • Minimize ground loops
  • Use heavy gauge wire (#12 AWG or larger)

Implementation:

  • Copper ground bus bar
  • Short, direct connections
  • No daisy-chaining
Technical Ground

Clean Technical Ground

Separate from Safety Ground:

  • Dedicated technical earth
  • Audio equipment reference
  • Minimize noise coupling
  • Connect to safety ground at single point

Wire Requirements:

  • Minimum #12 AWG copper
  • Maximum 25 ohms resistance
  • Separate conduit from power
Isolated Ground

Isolated Ground Systems

Critical Equipment:

  • Dedicated ground conductor
  • Orange NEMA 5-15R receptacles
  • Insulated ground bus
  • Single-point panel connection

Applications:

  • Digital audio workstations
  • Critical monitoring systems
  • Computer-based equipment
Best Practices

Grounding Do's and Don'ts

✓ DO:

  • Use star ground topology
  • Keep ground runs short and direct
  • Use proper gauge conductors
  • Maintain single-point connections
  • Bond all metallic enclosures

✗ DON'T:

  • Create ground loops
  • Use chassis as ground return
  • Mix AC and DC grounds
  • Daisy-chain ground connections
  • Use undersized conductors