RMC Conduit Fill Calculator - Rigid Metal Conduit
Calculate RMC (Rigid Metal Conduit) fill percentages with our free, NEC-compliant calculator. RMC provides maximum protection for electrical conductors and is the most durable conduit option available. It's ideal for heavy-duty applications requiring superior mechanical protection and strength.
RMC is the gold standard for electrical conduit systems, offering unmatched durability and protection in demanding industrial, commercial, and hazardous locations. Its thick-wall construction provides superior resistance to physical damage and can be used in all atmospheric conditions.
Input Parameters
Conductors
Results
Visual Representation
Enter conduit and wire information to see results
NEC Fill Requirements
According to NEC Chapter 9, Table 1: 1 conductor = 53% max, 2 conductors = 31% max, 3+ conductors = 40% max, Nipples = 60% max
RMC Application Scenarios
Ideal Applications:
- Industrial facilities and manufacturing plants
- Hazardous (classified) locations
- Areas subject to severe physical damage
- Outdoor exposed installations
- Service entrance and feeder runs
Key Advantages:
- Maximum mechanical protection
- Can be used as equipment grounding conductor
- Suitable for all atmospheric conditions
- Threaded connections for secure assembly
- Long service life and durability
Related Calculators
EMT Conduit Calculator
Calculate fill for electrical metallic tubing
PVC Conduit Calculator
Calculate fill for Schedule 40 & 80 PVC conduit
Residential Calculator
Optimized for home electrical projects
Commercial Calculator
For commercial building electrical systems
General Calculator
All conduit types and configurations