Cable Pulling Tables

Cable pulling analysis allows the user to quickly calculate cable pulling tensions and sidewall bearing pressures to perform "what-if" scenarios for pulling conductor of various sizes through conduit. Cable pulling analysis provides calculations for several pulling methods including pulling eye and basketweave grip. These calculations rely on the following tables. These tables must be owned by SDE.

MMENG_BASICFRICTIONCOEFF

Field

Data Type

Description

Units

How Used

ConduitType

text

Code for the type of conduit

   

CableCoverMaterial

text

Code for the cable covering material selected.

 

Populates the Covering Material field (Figure 1).

SingleCblPullSWBPLT150

float

Basic coefficient of friction for single cables less than 150 lbs/ft.

 

Used to calculate pulling tensions and sidewall bearing pressure.

MultiCblPullSWBPLT150

float

Basic coefficient of friction for multiple cables less than 150 lbs/ft.

 

Used to calculate pulling tensions and sidewall bearing pressure.

SWBPGT150

float

Basic coefficient of friction for single cables more than 150 lbs/ft.

 

Used to calculate pulling tensions and sidewall bearing pressure.

Description

text

A description of the conduit selected.

 

Used to present a list of conduit types.

MaterialDesc

text

A description of the cable covering material selected.

 

Used to present a list of covering materials.

MaxSWBP

long integer

Maximum sidewall bearing pressure allowable for the conduit type covering material.

 

Used to compare against calculated sidewall bearing pressure.

The Cable Pulling Analysis dialog is shown below.

MMENG_CABLEPARAMS

Field

Data Type

Description

Units

How Used

CableType

text

The type of cable selected.

 

Code used to look up the cable type description.

Description

text

A description of the cable selected.

 

Populates the Cable Type field (Figure 1).

CableOD

double

Cable outer diameter

inches

Used to calculate pulling tension and sidewall bearing pressure.

CableWeight

double

Weight of the cable

lbs/ft

Used to calculate pulling tension and sidewall bearing pressure.

InitTension

long integer

Initial tension of the cable before pulling.

lbs.

Used to calculate pulling tension and sidewall bearing pressure.

AllowedTension

long integer

Maximum allowable tension.

lbs.

Used to calculate pulling tension and sidewall bearing pressure.

LeadSheathOD

double

Outer diameter of the lead sheath.

inches

Used to calculate pulling tension and sidewall bearing pressure.

LeadSheathThick

double

Thickness of the lead sheath.

inches

Used to calculate pulling tension and sidewall bearing pressure.

LeadSheathArea

double

Area of the lead sheath.

square inches

Used to calculate pulling tension and sidewall bearing pressure.

PullType

text

The type of assembly (single, quad, tri, PILC).

 

Used to calculate pulling tension and sidewall bearing pressure.

Material

text

Conductor Material (e.g., aluminum, copper)

 

Used to calculate pulling tension and sidewall bearing pressure.

CondSize

text

Size of the conduit.

 

Used to calculate pulling tension and sidewall bearing pressure.

StockSize

long integer

Non-standard comparitive conductor size.

 

Used to calculate pulling tension and sidewall bearing pressure for multiple cables.

NeutralPresent

text

Flag that denotes that neutral is part of the assembly.

 

Used to display the material of the cables when not included in the group.

MinCondNum

short integer

Minimum number of conductors in a pull scenario.

 

Used to build a list for the number of cables. Populates the Number of Cables field (Figure 1).

MaxCondNum

short integer

Maximum number of conductors in a pull scenario.

 

Used to build a list for the number of cables. Populates the Number of Cables field (Figure 1).

MinConduitSize

long integer

Recommended minimum conduit size.

inches

Used to warn users when the conduit size is less than recommended.

NumConductors

long integer

The number of conductors in the pull grouping.

 

Used to calculate pulling tension and sidewall bearing pressure.

IsAssembly

text

Flag to indicate the group is an assembly.

 

Used to calculate pulling tension and sidewall bearing pressure.

MMENG_MAXTENSIONPULLEYE

Field

Data Type

Description

Units

How Used

CondSize

text

Stock size of conductor.

 

Used to calculate maximum tension for pulling eye.

CondArea

double

The area of the conductor.

square inches

Used to calculate maximum tension for pulling eye.

Material

text

Conductor material.

 

Used to calculate maximum tension for pulling eye.

MaxTensionPerCond

long integer

Maximum tension for the conductor.

lbs.

Not currently used.

PullCoeff

long integer

Pulling pressure of pulling.

PSI

Used to calculate maximum tension for pulling eye.

MMENG_NEUTRALPARAMS

Field

Data Type

Description

Units

How Used

NeutralType

text

The type of neutral cable selected.

 

Code used to look up the neutral cable type description.

Description

text

A description of the neutral cable selected.

 

Populates the Cable Type field with values for neutral cables (Figure 1).

StockSize

long integer

Non-standard comparitive conductor size.

 

Used to calculate pulling tension and sidewall bearing pressure for neutral cables.

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