IMC Conduit Fill Calculator - NEC Compliant
Calculate IMC (Intermediate Metal Conduit) conduit fill percentages with our free, NEC-compliant calculator. IMC conduit offers a perfect balance between strength and weight, providing superior protection for electrical installations at a lower cost than RMC.
IMC combines the strength of rigid conduit with lighter weight and easier installation. It's the preferred choice for many commercial and industrial installations where strong mechanical protection is needed without the weight and cost of RMC.
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
IMC Conduit Features & Benefits
Key Features:
- Lighter weight than RMC with comparable strength
- Thinner walls mean larger interior space
- Cost-effective alternative to RMC
- Available in sizes from 1/2" to 4"
Common Applications:
- Commercial building installations
- Industrial facilities
- Exposed locations requiring protection
- Both indoor and outdoor installations
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