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What must be attached to the top end of a conduit riser where conduit is used in a service?
Wiki User
∙ 13y ago
It's called a Weatherhead.
Wiki User
∙ 13y ago
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Are conduits secured every 5-6 at Electrical service entrance?
Service conduit must be secured every 10 feet and withing 3 feet of a service box.
When paralleling a service must the sets of conductors be in separate conduits or can they be in the same conduit?
They can be either separated or combined. What governs the choice is the size of the service and the conductors feeding the service and the ability to physically connect metering equipment to larger size conduits. When paralleling conduits make sure all the phase wires are in their individual conduits to cancel the field effect of the wires. Eg. conduit 1 - L1 + L2 + N , conduit 2 - L1 + L2 + N. Likewise with three phase, conduit 1 - L1, L2, L3, conduit 2 L1, L2, L3.
Can you have only one current carrying conductor in a conduit?
You can have only one current carrying conductor in a conduit, but that conduit must have a slot to relieve the eddy currents that will be created by the transformer effect created by the conductor. It is better to run the neutral or opposite conductor along with the hot conductor together in the same conduit, or through the same penetration, so as to minimize this effect.
What is the minimum size of service conduit?
Answer for USA, Canada and countries running a 60 Hz supply service.Conductors should not be smaller than #8 copper. With that that in mind a 1" conduit would work. Better to use at least 1 1/2-2" depending on the amps of your service. Bigger is always better!As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
If you have a motor that must remain adaptable to several sizes of belts what is the maximum length of flexible metal conduit you can use before the conduit requires fastening?
Adding an extra length of shaft on the existing shaft to take extra pulleys will put an extra load on the bearings supporting the shaft. In the long term this would shorten the life of the bearings. The makers might be able to supply more information like the side-load specification for the bearings. If in doubt support the outer end of the shaft.
Are conduits secured every 5-6 at Electrical service entrance?
Service conduit must be secured every 10 feet and withing 3 feet of a service box.
When paralleling a service must the sets of conductors be in separate conduits or can they be in the same conduit?
They can be either separated or combined. What governs the choice is the size of the service and the conductors feeding the service and the ability to physically connect metering equipment to larger size conduits. When paralleling conduits make sure all the phase wires are in their individual conduits to cancel the field effect of the wires. Eg. conduit 1 - L1 + L2 + N , conduit 2 - L1 + L2 + N. Likewise with three phase, conduit 1 - L1, L2, L3, conduit 2 L1, L2, L3.
Does the metal conduit count as a ground?
No, each conduit must contain a separate grounding conductor.
When exist a junction box EMT conduit must be supported with how many inches?
When exist a junction box EMT, conduit must be supported within 18 inches.
Can a three phase circuit be installed in the same conduit or in different conduits?
The conductors of any three phase circuit must be run in the same conduit. If the circuit requires a neutral, it must also run with the conductors in the same conduit. (If they were to be run in more than one conduit or raceway, the circuit would not operate properly.)
Can multiple feeders be in same conduit?
Yes they can. If the feeders are of different sizes, then a conduit fill calculation must be made to ascertain that the conduit does not become overfilled. Cross sectional areas of the conductors are found and it is then determined what the conduit cross sectional fill will allow.
Can you run insulated wires in a conduit pipe?
Except for the ground wire they must be insulated.
What is another name for thin wall conduit?
There are many types of conduit used for the containment of electrical wires. PVC is a non-metallic option. If you need something that provides mechanical protection, EMT is a steel conduit with a thin wall. Need even more mechanical protection, you can use rigid conduit. It comes in steel or aluminum, and must be threaded together.
Can you have only one current carrying conductor in a conduit?
You can have only one current carrying conductor in a conduit, but that conduit must have a slot to relieve the eddy currents that will be created by the transformer effect created by the conductor. It is better to run the neutral or opposite conductor along with the hot conductor together in the same conduit, or through the same penetration, so as to minimize this effect.
Do you need a mast to run aerial wire from a garage with a 100 amp fuse box to an office trailer?
Yes, it must have a standoff, and the proper service head in. I would run it underground instead of overhead. Use underground wire in a conduit.
What is the code for strapping EMT conduit from a box?
The 2008 NEC code states that conduit must be strapped within 36" or 3 feet from every box or connector, then every 5 feet is acceptable from there.
To use gadgets they must be attached to the windows taskbar?
CIS 5.2 Brooklyn College, correct. They must be attached to the Sidebar!!
