Capstan

Cable pulling tension

Southwire E-7–E-9, E-15 · IEEE 576 · NEC Ch. 9

Southwire does not endorse this app.

328lbf at winch B

of 5,078 lbf limit·sidewall 51.2 / 1,000 lbf/ft

Pass

Limit 5,078 lbf is above this scale90° horizontal · R 36 in, sidewall 32.9 lbf/ft90° concave up, pulling up · R 36 in, sidewall 51.2 lbf/ftWinch B · 328 lbf3800AB

Distance follows the conduit, including the arc. Shaded bands are bends. Copper is the winch you picked; the faint line is the other direction.

Route, A to B

Positive grade rises toward B. Bend travel is as the cable moves toward B.

  1. 01 · Straight
  2. 02 · Bend
  3. 03 · Straight
  4. 04 · Bend
  5. 05 · Straight

Stations · winch at B

  1. 120 ft · horizontal

    136 lbf

    T = 75 + 2.178 × 120 × (sin 0° + 1.169 × 0.2 × cos 0°) = 136 lbf

  2. 90° horizontal · R 36 in

    197 lbf

    T = 136 × e^(1.169 × 0.2 × π/2) = 197 lbf

    SP = (3ω − 2) T / (3 R) → 0.502 × 197 / 3 = 32.9 lbf/ft

  3. 30 ft · horizontal

    212 lbf

    T = 197 + 2.178 × 30 × (sin 0° + 1.169 × 0.2 × cos 0°) = 212 lbf

  4. 90° concave up, pulling up · R 36 in

    306 lbf

    T = 212 × e^(1.169 × 0.2 × π/2) = 306 lbf

    SP = (3ω − 2) T / (3 R) → 0.502 × 306 / 3 = 51.2 lbf/ft

  5. 10 ft · 90° up toward B

    328 lbf

    T = 306 + 2.178 × 10 × (sin 90° + 1.169 × 0.2 × cos 90°) = 328 lbf