The Time to Install GRC Conduit calculator estimates the amount of time needed to install Rigid Galvanized Conduit (GRC ) based on the length of the conduit (L), the Level of Difficulty (lvl) and the size (S) of the conduit.
INSTRUCTIONS: Choose units and enter the following:
- (S) Choose a size of conduit. These are inches.
- (lvl) Choose a level of difficulty.
- (L) Enter the length of the conduit run
RGC Conduit Install Time (t): The calculator returns the install time in hours. However this can be automatically converted to compatible units via the pull-down menu.
The Math / Science
GRC stands for Galvanized Rigid Conduit which is a rigid metallic conduit. Rigid conduits have the thickest walls or steel raceways. GRC can be either threaded (straight tapped) or have integral coupling. The coating is zinc on both the inside and out.
The relationship between length of conduit, level of difficulty, size of GRC and the time to install comes from industry standard numbers. The following table is the basis of this calculator.
| Hours per Foot Installed | ||||
| Size | Lvl1 | Lvl2 | Lvl3 | Lvl4 |
| 1/2" | 0.040 | 0.050 | 0.060 | 0.075 |
| 3/4" | 0.050 | 0.062 | 0.075 | 0.094 |
| 1" | 0.060 | 0.075 | 0.090 | 0.113 |
| 1-1/4" | 0.075 | 0.094 | 0.113 | 0.141 |
| 1-1/2" | 0.081 | 0.101 | 0.122 | 0.152 |
| 2" | 0.103 | 0.129 | 0.155 | 0.194 |
| 2-1/2" | 0.120 | 0.150 | 0.180 | 0.225 |
| 3" | 0.150 | 0.188 | 0.225 | 0.281 |
| 3-1/2" | 0.180 | 0.225 | 0.270 | 0.338 |
| 4" | 0.210 | 0.263 | 0.315 | 0.394 |
Galvanized Rigid Conduit (GRC) Calculators
- GRC Conduit Installation Time: Computes the Estimated Install Time for GRC (Galvanized Rigid Conduit) based on the GRC size, length of conduit and level of difficulty.
- GRC Conduit Installation Length: Computes the Length of GRC (Galvanized Rigid Conduit) installed based on an installation time period and level of difficulty.
- GRC Conduit Weight: Compute the weight of GRC conduit based on size and length.
- Rolling Offset: Computes the run and travel distances in a rolling offset.
Electrician Estimation Calculators
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- EMT Conduit Installation Time: Estimate installation time of Electrical Metallic Tubing conduit based on the length of conduit, size of conduit and level of difficulty.
- GRC Conduit Installation Time: Estimate installation time of Galvanized Rigid Conduit based on length of conduit, size of conduit and level of difficulty.
- PVC 40 Conduit Installation Time: Estimate installation time of PVC Schedule 40 conduit based on length of conduit. size of the conduit and level of difficulty.
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Conduit Weight Estimates
- EMT Conduit Weight: Estimate the weight of Electrical Metallic Tubing based on the size of the tubing and the length.
- GRC Conduit Weight: Estimate the weight of Galvanized Rigid Conduit based on the size and length of the conduit.
- PVC Schedule 40 Weight: Estimate the weight of Schedule 40 PVC based on the size, length and whether it is PVC or CPVC.
- Metal Clad Cable Weight: Estimate the weight of metal clad cable based on the size and the length.
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- Outlets and Wiring for a Room: Computes the number of outlets (boxes) and length of wire to connect them in a room based on the room dimensions and the outlet spacing.