NEC 220.82 Optional Method600 Sq Ft • Detached Garage / Woodworking ShopCode Compliant
60 Amp Workshop Subpanel Load Calculation
Complete electrical demand load breakdown following NEC Article 220.82. Formally verified for electrical permit submissions, service disconnect sizing, and utility service drop requirements.
Calculated Demand52.5 Amps@ 240V Single Phase
Recommended Panel60 AmpsNEC Standard Rating
Service Feeder (Al)#4 AWGTable 310.12 (75°C)
Minimum Conduit1"EMT / PVC Sch 40
Connected Appliance Profile & Nameplate Loads
Specific mechanical equipment ratings evaluated for this residential dwelling unit
Cooking EquipmentNone (0 VA)
Clothes DryerNone (0 VA)
Water HeatingNone (0 VA)
HVAC Primary Heating/CoolingMini-Split AC / Heat 1-Ton (1,800 VA)
Electric Vehicle Supply (EVSE)None Configured
Auxiliary Fixed AppliancesTable Saw 3HP 240V (3,600 VA), Dust Collector 2HP 240V (2,400 VA), Air Compressor 2HP (2,400 VA), General Receptacles (2,400 VA)
NEC 220.82 Step-by-Step Demand Worksheet
Official calculation table matching municipal electrical permit application format
| Calculation Step • NEC Section | Connected VA | Demand Factor | Demand VA |
|---|---|---|---|
| General Lighting & Receptacles3 VA/sq ft • NEC 220.82(B)(1) | 1,800 VA | Subtotal Group | — |
| Small Appliance Circuits2 Circuits @ 1,500 VA • NEC 220.82(B)(2) | 0 VA | Subtotal Group | — |
| Laundry Branch Circuit1 Circuit @ 1,500 VA • NEC 220.82(B)(2) | 0 VA | Subtotal Group | — |
| Fixed & Fastened-in-Place AppliancesRange, Dryer, WH, DW, Disposal • 220.82(B)(3) | 10,200 VA | Subtotal Group | — |
| General Connected Load Subtotal | 12,000 VA | — | — |
| • First 10,000 VA of General Load | 10,000 VA | 100% | 10,000 VA |
| • Remainder above 10,000 VA | 2,000 VA | 40% | 800 VA |
| General Demand Load Subtotal | — | 220.82(B) | 10,800 VA |
| Heating & Air Conditioning (HVAC)Largest Non-Coincident Load • NEC 220.82(C) | 1,800 VA | 100% | 1,800 VA |
| TOTAL CALCULATED DEMAND LOAD | — | Total / 240V | 12,600 VA • 52.5 A |
Service Conductor & Grounding Sizing Schedules
Minimum wire gauges and raceway sizes compliant with NEC Table 310.12 and Table 250.66
Service Entrance Conductors
Copper Conductor (THHN/XHHW):#6 AWG Copper THHN (in conduit) or #4 NM-B
Aluminum Conductor (XHHW-2):#4 AWG Aluminum XHHW-2
Minimum Raceway / Conduit:1" PVC Sch 40 Underground
Temperature Rating:75°C Terminations
Grounding & Bonding Electrode System
GEC to Water Pipe / Intersystem:#6 AWG Bare Copper to ground rods
Ground Rod System:Dual 5/8" × 8ft Rods (6ft Spaced)
GEC to Ground Rods (Max):#6 AWG Copper
Main Bonding Jumper:Installed at Main Disconnect Only
Master Electrician Inspection & Installation Notes
- Calculated demand is 52.5A, operating safely under a 60A feeder breaker.
- Electrician note: Motor loads (compressor, table saw, dust collector) require 125% rating on the largest motor per NEC 430.24.
- A 60A feeder can be run with #6 AWG THHN copper in 1" PVC conduit.
Frequently Asked Code Questions
Can a 60 amp subpanel run a welder and air compressor?
Yes, provided they are not operated simultaneously at peak load. A 50A welder running at full duty cycle will consume most of the 60A capacity, requiring compressor cycles to be paused during heavy welding.