Can I run conduit containing 120V wires inside larger conduit for 240V wires?

Question

I was wondering if I could run 120v wires inside in a larger conduit that has higher voltage wires 240v, in a smaller piece of conduit?
The reason I ask is that I have a manufactured home and when they installed the 240v wiring coming from the meter it is run under the house in the crawlspace. It's not in conduit untill it enters the bottom of the electrical panel. When the water pump (120v) was installed they just ran it into the conduit with the 240v wiring.
I know for certain you can't run low and high voltage in the same conduit, but I thought that if I ran a 1/2" conduit inside the 2" for the 120v that would rectify the violation.

DoxyLover · Answer

I assume you are in the USA for this answer.
120 volt circuits are not considered “low voltage”. Low voltage means 60 volts (I believe) or lower. 120 volts and 240 volts are the same voltage class and it is perfectly fine to run both of them in the same conduit.
Besides, in the USA, 240 volt circuits are simply two legs of 120 volts in opposite phase. While you have 240 hot-to-hot, it’s still 120 volts hot-to-ground, just like a 120 circuit.
Edit: typo

Can I run conduit containing 120V wires inside larger conduit for 240V wires?

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