# Can You Run High And Low Voltage In Same Conduit?

Conduits matter because they protect delicate wires and cables from harm. But does the voltage affect the contents of the conduit?

## Can You Run High Voltage And Low Voltage In The Same Conduit?

So long as the wire sizes are correct, you don’t have to concern yourself with factors like the voltage drop and overheating. You can avoid accidents by selecting conductors with the same temperature rating. However, for the most part, this practice is safe.

Consider the following :

1). What Is Low Voltage?

No one ever asks this question. They compare 110V and 240V because they think one is high voltage and the other is low voltage. But Voltages as high as 750V still count as low-voltage.

In that regard, your biggest concern is whether you can run two low-voltage cables through the same conduit.

Can These Cables Run In the Same Conduit?

2). Does The Voltage Difference Matter?

Cables with a significant voltage difference require a continuous barrier to separate them.

3). Does The Insulation Matter?

The insulation is more important than the voltage. Cables with different voltages could share a conduit if they were insulated at 600V. Challenges only arise if the electrical system exceeds 1000V. But in that case, high and low-voltage cables can still run in the same conduit if a barrier keeps them isolated from one another.

4). Conductors VS Cables

You cannot run high and low-voltage conductors in the same conduit. This practice only works if you have high and low-voltage cables. Individual conductors are not an option.

5). What About Line and Control Voltage Wires?

Inside Lighting experts discourage consumers from running low-voltage and line voltage cables in parallel because the interference will become an obstacle. Maintain 16 inches between the two. You should also ensure that they only cross at 90 degrees.

7). What About AC and DC Cables?

Don’t place DC and AC cables in the same conduit. The chances of a DC cable inducing voltage on the AC cable are high. Use a divider to isolate AC and DC cables from each other.

8). What Is The Worst Outcome?

This practice has drawbacks. For instance, what if your high and low-voltage lines develop tears in their jackets? The high voltage wires can create interference. Interference is particularly problematic if the low-voltage wires are data cables. The electromagnetic interference will disrupt the signals.

Don’t forget the confusion this practice can cause. What if a contractor confuses the low-voltage lines with their high-voltage counterparts or vice versa? The last thing you want is for a professional to connect high-voltage conductors to a low-voltage application.

Admittedly, experienced contractors are unlikely to do this. But mistakes happen all the time. You are better off eliminating this possibility altogether by keeping the cables in different conduits.

## What Does The NEC Say About It?

NEC allowed conductors from different systems to share an enclosure if the insulation voltage rating of the conductors did not exceed the maximum circuit voltage. On the other hand, the regulations prohibited consumers from putting communication wires and electric conductors in the same raceway.

NEC allows contractors to run conductors with ratings of 600 volts or less through the same wiring enclosure.

## Does Low Voltage Need To Be In Conduit?

‘Low Voltage’ is any wire with a rating of less than 50V. You can leave them exposed.

This includes the conductors you find in phones, thermostats, alarm sensors, LED lighting, Wi-Fi networks, etc. You don’t have to run these wires through a tube. But the safety issue will ultimately shape your decisions.

After all, conduits are not a luxury. In fact, most contractors would rather avoid conduits because they are too much of a hassle. It can take hours to pull a wire through a pipe, especially the thicker gauges with stiff constructions.

This task is even more challenging for projects that require multiple cables to share the same conduit. But conduits are necessary because they defend against everything from extreme heat and cold to pests and moisture.

If you want to run your cabling on the surface, but the conditions in the environment pose a threat to the cable, you need a conduit. If you’re going to bury the wires, a conduit can protect against moisture, pests, and pressure.

Naturally, you must account for the insufficient ventilation. A cable can overheat because it transmits too many amps, and the heat can’t escape because of the tube. Then again, low-voltage conductors are called so because they transmit very few amps.

You don’t expect them to overheat. More importantly, you can leave them exposed. Some avoid the difficulties associated with conduits by purchasing low-voltage armored cables. Armored cables have a strong sheath that provides the same protections you expect from a conduit.

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