What tubing should I put thru a 6 inch wall for electrical wiring?
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Here’s the clean, practical answer you’re looking for — the kind an electrician would give on‑site.
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🧰 What tubing should go through a 6‑inch wall for electrical wiring?

For running electrical wiring through a thick wall (like a 6‑inch exterior wall, concrete wall, or framed wall), the standard and safest choice is conduit, not just loose cable. The right type depends on whether the wall is interior, exterior, or concrete/masonry.
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🟦 Best Options (Ranked by Typical Use)

1. PVC Electrical Conduit (Schedule 40 or 80)
Most common for going through walls

Easy to cut and glue

Non‑corrosive

Great for exterior walls or concrete

Use Schedule 80 if the wall is exposed to impact or outdoors

Typical size:

1 inch for a few circuits

1.25–1.5 inch if you want room for future pulls

2 inch if you’re running multiple circuits or thick cables (e.g., 6‑3, 4‑3, or feeder cable)

2. EMT (Metal Conduit)
Good for interior walls

Stronger than PVC

Requires bending tools

Not ideal for exterior unless properly protected

Typical size:

Same as PVC: 1 to 1.5 inch for most home runs

3. Flexible Conduit (Liquid‑Tight or ENT)
Used when the wall penetration is awkward

Great for short transitions

Not ideal for long runs through a wall
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🧱 What size hole should you drill?

A 6‑inch wall thickness doesn’t change the conduit size — it just means you need a long drill bit or core bit.

For example:

1" PVC conduit → drill a 1⅜" to 1½" hole

1½" PVC conduit → drill a 2" hole
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🧯 Fire‑stopping (important)

If the wall is a fire‑rated wall, you must seal around the conduit with:

Fire‑rated caulk, or

Intumescent putty
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👍 My recommendation for most home setups

If you’re running wiring from one room to another or through an exterior wall:

Use 1¼" Schedule 40 PVC conduit through the wall.
It’s easy, cheap, safe, and leaves room for future wires.

If you want, tell me:

Is the wall interior, exterior, or concrete

What circuits or cables you’re running

Whether it’s for a server rack, NAS, cameras, or general electrical

…and I’ll size the conduit perfectly for your setup.

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