2-5-9 Flashcards
This lesson lists __?__ things about a cable that should be checked before pulling any cable into a conduit to make certain the correct cable is being pulled into the conduit.
seven
The jacket or sheath type is not one of the things to check before pulling a cable into a conduit.
false
One way to help prevent cable failure is to inspect the cable before it is pulled into the conduit. Physical defects you should be looking for include cracks, gouges, flat spots, and scratches, to the cable __?__.
jacket
When preparing to make a cable pull and you have cut the cables, but will not be making the pull immediately, the cable ends should be properly __?__.
sealed
There are several methods used to grip a cable for pulling. One is to grip the conductor and the other is to use __?__ over the cables.
a basket weave
Before any cable is pulled into a duct/conduit, you should make sure that there is adequate clearance between the duct/conduit and the __?__.
cable diameter
When a grip is applied over a non-metallic jacketed cable, the pulling force shall be limited to __?__ pounds provided this does not exceed any other calculated force measurement.
1000
cable pulling tensions should be observed because the cable may be damaged by the extra force exerted on it.
true
This lesson points out __?__ factors that determine if a length of cable can safely be pulled into a duct system.
eight
The __?__ is one of the factors that determine if a length of cable can safely be pulled into a duct system.
coefficient of friction
The ratio between the force needed to overcome friction, and the weight of the object being moved is called the __?__ of friction.
coefficient
Among the variables that need to be known to calculate the pulling tension of a straight cable pull, the __?__ at the entrance of the conduit is one of them
backtenction
A cable pull that has both straight and curved conduit sections is calculated by considering each section (straight and curved), one at a time.
true
The way to clear an obstruction in a duct before cable is pulled through it is to use a __?__.
mandrel
A fishline is needed in all conduits to help install the pulling rope used to pull the cable through the conduit. A steel fish tape is never used because the equipment might be energized.
false
This lesson points out __?__ methods that can be used to help install a fishline in a conduit.
four
The capstan (powerhead, or cable puller) is used for many underground pulling jobs because of its light weight, mobility, and power. Most capstans are capable of pulling tensions of __?__ pounds at __?__feet per minute.
759/60
There will be times when you must pull cable in an area where local traffic may be flowing or pedestrians will have access. All work areas must be __?__.
barricade and warning signs must be in place to warn the public
When pulling cable into a manhole, there are times you require long tails (ends) left on the cable being pulled in. When longer cable tails are required, you are better off to __?__.
feed the cable from the man hole
One hazard associated with using pulling lubricant is that it may not be compatible with the cable jacket.
true
To prevent the cable from being damaged when feeding it down into a manhole, you should use a flexible feeding tube. This steel flexible tube is usually __?__-inch(es) in diameter and can be 10-20 feet in length.
four
Once cable has been pulled into the manhole the ends need to be __?__.
sealed (caped) to prevent any moisture from entering the conductor
Once the cable has been pulled into the manhole and the cable has been racked, the ducts that the cables are in need to be sealed. Two accepted methods for sealing these ducts are to use Duct Seal and the other is to use __?__.
rayflate duct sealing system
Pulling tension can be affected by the direction of the pull. The cable reels should be set-up to feed the cable at the end of the conduit that is closest to the __?__.
first bend
To help prevent damage to the pull rope or cable when you must pull around a corner or object with a sharp edge, you can use tubes, adequately sized blocks, or __?__ to prevent abrasion.
sheaves
Pulling tensions can be reduced to help the cable installation job proceed with as little pulling friction or tension as possible by manually turning the reels, lubricating the reel and making sure the __?__.
reel stands are level
It is extremely important that the cables’ phase identification and circuit number be correctly placed on all pulled cables. If the cables are improperly marked it may lead to __?__.
equipment damage, explosion/death, or fire
