Mini Split wiring

[Fly-Guy5]

Hi,
My office just installed a mini split for out network lab. The ac guy installed the inside and outside units and ran the wire and piping between the two.
He installed a vinyl raceway on the outside of the building.
I am pulling a 10/3 mc from the electrical panel to the unit.
My questions are this:
1. Is it ok to run the mc outside in the vinyl raceway? I would think not.
2. Should install a junction box in the building above the unit and run my mc to that and liquid tight or nmc from there out and into the vinyl raceway and to the disconnect?
I don't have the option of drilling out through wall and brick to the back of the disconnect directly. I need to feed through the same raceway to the disconnect and then to the condenser.

All input welcome.

 

[Poweranytime]

Nec 330.10 uses permitted. What is the max fuse and the mca on the outside unit

 

[hbiss]

Is it ok to run the mc outside in the vinyl raceway? I would think not.

Me too.

Couple of ways to handle this.
Like you said, transition to NMC or liquid tight inside. With MC you can just remove the armor and run the conductors in the raceway.
Transition to UF.

-Hal

 

[electrofelon]

I would just use or make a mc to LFMC transition fitting and continue the run outside without making a splice.

 

[Poweranytime]

I would agree with electrofelon wiring methods. Why the 10/3 does it require a neutral?

 

[Fly-Guy5]

Nec 330.10 uses permitted. What is the max fuse and the mca on the outside unit

Ac guy wants a 30 amp breaker and disconnect. I pulled 10/3

 

[Fly-Guy5]

Me too.

Couple of ways to handle this.
Like you said, transition to NMC or liquid tight inside. With MC you can just remove the armor and run the conductors in the raceway.
Transition to UF.

-Hal

That's what I was thinking.

 

[Fly-Guy5]

I would agree with electrofelon wiring methods. Why the 10/3 does it require a neutral?

? I would have rather ran 10/2. My my boss, the owner, wanted 10/3. So I did what I was told.

 

[Fly-Guy5]

Thanks. I'm going to place a junction box above drop ceiling and run the mc to it, strip off about 12' of jacket, run liquidtight out from the box to the disconnect and use a pre wires whip from the disconnect to the condenser. This will look nice.

Thanks for your input.

 

[Dennis Alwon]

Already answered --mc is suitable for outdoors 330.10

 

[Greg1707]

Already answered --mc is suitable for outdoors 330.10

Looking at my 2011 code book I see:

330.10A3 "indoors or outdoors"
330.10A11 "In wet locations where any of the following conditions are met . . . "


Two questions:
What is OUTDOORS?
If I buy a roll of 12-2 MC cable at HD --will it be suitable for wet locations?

 

[GoldDigger]

I would agree with electrofelon wiring methods. Why the 10/3 does it require a neutral?

The link from outside unit to inside unit is typically 240V, no neutral, for power and an L1 or L2 referenced control wire.

 

[Dennis Alwon]

Looking at my 2011 code book I see:

330.10A3 "indoors or outdoors"
330.10A11 "In wet locations where any of the following conditions are met . . . "


Two questions:
What is OUTDOORS?
If I buy a roll of 12-2 MC cable at HD --will it be suitable for wet locations?

I don't use mc but it appears it is rated wet location. I know some of it can be installed underground but it must be listed for that. Not all mc cable can be used ug.

 

[steven765]

strip off about 12' of jacket, run liquidtight out from the box to the disconnect

Do the individual conductors in MC have labeling. Romex doesn't often making this a violation. Ask truly as a question as I don't play with MC much.

 

[ActionDave]

Do the individual conductors in MC have labeling. Romex doesn't often making this a violation. Ask truly as a question as I don't play with MC much.

Some MC has labeling on the conductors, some has a plastic tape with labeling wrapped around the conductors.