What is jam ratio?

What is jam ratio?

Jam ratio is defined as the ratio of conduit inner diameter (D) to the cable outside diameter (d).

What is jam probability?

The jam ratio is calculated by slightly modifying the ratio D/d. A value of 1.05D is used for the inner diameter of the conduit because bending a cylinder creates an oval cross-section in the bend. If 1.05D/d is larger than 3.0, jamming is impossible. If 1.05D/d is between 2.8 and 3.0, serious jamming is probable.

How do you calculate force pulling cables?

P = Tb / r (Formula 6) Where:P. = actual sidewall pressure on cable, lbs./ft. Tb = pulling tension at and of bend, lbs. The maximum allowable pulling tension at bend (Tbm) is the limit that the calculated pulling tension (Tb) should be compared.

How do you calculate side wall pressure?

The sidewall pressure (P) in general is defined as the tension out of a bend expressed in pounds divided by the inside ra- dius of the bend expressed in feet.

How much pectin do I add to jam?

Measure 1 tablespoon water and 1 ½ teaspoons powdered pectin for each cup of jelly or jam. Place in small saucepan and place over low heat, stirring, until the powdered pectin is dissolved. Add to the sugar and fruit mixture and stir until thoroughly blended (about 2 to 3 minutes).

When pulling multiple conductors the pulling tension should?

Calculating the pulling tension where T is the total pulling tension (lb), L is the length (ft) of cable feeder you’re pulling, w is the total weight (lb/ft) of the conductors, f is the coefficient of friction (usually 0.5 for well-lubricated conditions), and W is the weight correction factor.

What is pull tension?

In physics, tension is described as the pulling force transmitted axially by the means of a string, a cable, chain, or similar object, or by each end of a rod, truss member, or similar three-dimensional object; tension might also be described as the action-reaction pair of forces acting at each end of said elements.

What is the maximum pulling tension for a solid copper conductor coaxial?

He explained that the rule of thumb is that copper conductors can withstand about 10,000 psi (pounds-per-square-inch) without significant deformation.

Can you put too much pectin in jam?

Too much pectin or overcooking your jelly or jam will cause it to be overly firm. “People are surprised by the delicate balance between the ratios of sugar, acid and pectin. If you have too much pectin compared to the sugar and acid in the mix, you get overly firm jelly or jam,” says Loe.