Power Cable Pulling: JAM_RATIO
Power cable pulling tension limits, sidewall bearing pressure limits, friction coefficients, jam ratio thresholds, minimum bend radius multipliers, and NEC conduit fill limits. Covers copper (K=0.008) and aluminum (K=0.006) max tension by AWG/kcmil per ICEA P-79-561 / IEEE 1185-2019; SWBP limits for XLPE, EPR, PVC, armored, and lead-sheathed cables; COF by conduit type (steel/PVC/HDPE/FRP) and lubrication condition; jam ratio safe zones (danger: 2.7–3.1); NEC 300.34 bend radius multipliers.
| parameter type | record id | notes | unit | value max | value typical |
|---|---|---|---|---|---|
| JAM_RATIO | JAM_DANGER_ZONE | 1.05*D/d between 2.7 and 3.1: high jam risk zone; avoid this conduit/cable combination for 3-cable pulls | dimensionless | 3.1 | 2.7 |
This is a sample. Search the full power cable pulling dataset and 300+ more by creating a free account and accessing the database.
Get started for FREE