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No you can not mix voltages. That being said if the lower voltage is part of the control circuit from a MCC control centre then yes they can be mixed as the low voltage control is part of the complete system.

Composite power & control Teck 90 cable has the power feeders and usually 3/#12 or 3/#14 wires embedded in the same cable. These three wires allow for remote stop - start controls to be mounted neat the motor out in the field.

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8y ago
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10y ago

Yes as long as the 120 volt control wires are insulated rated at 600 volts. The wiring also has to pertain to the control of the motor. For example a three wire stop - start station for remote operation of the motor can be run along side of the motor feeders. The motor feeders and control wires must all come out of the same MCC bucket. There is a composite cable on the market that is used for just this purpose. The cable has the three motor feeders and three #14 or #12 control wires and a ground all in the same cable sheath.

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10y ago

No this is a very bad idea.

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3y ago

Yes, not common practice though.

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Q: Can 120v and 277v be in the same conduit?
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Related questions

What is use of step up transformer?

A step-up transformer increases (or "steps up") the voltage of an alternating electrical current. For example, a step-up transformer could be used to increase 120V AC to 277V AC to provide power to 277V electrical equipment in a building that does not already have a 277V electrical system.Other examples where a step-up transformer might be used include these:Using 240V AC equipment with a 120V AC mains supply.Generating high voltage for use with tubes, such as a CRT.Generating high voltage for use in electric energy distribution.


Can you use existing PVC conduit run from basement to 8th floor for 120v circuits for chillers?

The simple answer to your question is yes. But there are limits to how many wires can be in any conduit, and the current carrying capacity of the conductors can be affected by distance, ambient temperature, and how many conductors are contained in the same conduit. Other things to consider are, Can you physically fit the wires in there? Would it be easier to run a new conduit? Do you have the manpower necessary to get the work done?


Is there a way to install a 120V light on a 277V circuit?

no ----------------------------------------------------------------------------------- Stepdown transformer. More expensive than buying the correct light fixture. Y-THINK-Y


What is low voltage transmission?

In the supply industry it refers to circuits of below 1000 volts. Common voltages used are 120v, 208v, 230v, 240v, 277v, 400v, 415v, 480v.


What is the difference between power limited and power non-limited electrical circuits?

In wiring or cabling, high voltage lines and low voltage lines should be separately installed. High voltage lines which carry AC 120V/208V/277V/480V should be installed in one conduit, and low voltage lines which carry DC 12V/24V/48V and non-current carrying lines should be installed in another separated conduit. It is one of the strict requirement of NEC. When AC 120V wires and DC 12V wires are laid inside of one rack, they should have spaces more than 6 inches between them. - dona


Is it legal to support a conduit from another conduit of the same size?

No, the conduit has to be supported individually from a supportive structure. The spacing of the strapping is related to the size of the conduit.


Can you run 110 and 220 volt circuits in the same conduit?

Yes, 120 and 240 volts can be run in the same conduit.


Are 120V and 208V the same?

no 208v is bigger


Can you put two wires in one conduit and two wires in another conduit of the same circuit?

YES


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 you mix line and load in same conduit?

No


What is the multiplier for 45 degree offset in conduit bending?

Back set for all conduit sizes is not the same. The greater the diameter of the conduit the length of back set increases. Without the diameter size of the conduit, an answer can not be given.