Water Well wire

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jbtxlake

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I want to run some well wire from outside where the pump is located to inside a garage where the tank and well controls are located. I would like to run the 3 conductor with ground and a overall PVC jacket well cable up a wall and through the attic to the controls. Is this PVC jacketed cable a code violation because it's in the attic.
 
Unsure which "this PVC jacketed cable" you are referencing. I know of one submersible pump cable with a overall PVC jacket but it is not rated for interior wiring.
Do you have a better description ?
We have a couple of wire an cable folks who post here. Hopefully one of them will add insight.
 
water well wire

water well wire

The Cable is submersible pump cable type thw with a pvc jacket. Article 310.10(B) seeems to indicate type thw cable could be used in a dry oe wet locations. (Can that be considered in a dewelling) Here's my problem, I don't know how to run this circuit, if I use 3 conductor nm I would have to remark the white wire to yellow and wouldn't that violate 200.6(A). 334.10 seems to indicate nm, nmc and nms are the only cables you can use in a dwelling. Does that mean I can't use thw or thhn single conductors in conduit inside a dewelling. I know this is done all the time. How is it accomplished?
 
jbtxlake said:
The Cable is submersible pump cable type thw with a pvc jacket. Article 310.10(B) seeems to indicate type thw cable could be used in a dry oe wet locations. (Can that be considered in a dewelling) Here's my problem, I don't know how to run this circuit, if I use 3 conductor nm I would have to remark the white wire to yellow and wouldn't that violate 200.6(A). 334.10 seems to indicate nm, nmc and nms are the only cables you can use in a dwelling. Does that mean I can't use thw or thhn single conductors in conduit inside a dewelling. I know this is done all the time. How is it accomplished?
Click to expand...
If it is marked THW then it can be used outside the well casing, but still would need to be in a raceway or wireway - it is not a listed stand alone cable assembly.

334.10 tells us where NM cable is permitted, it does not tell us that dwellings are limited to using only NM cable. In fact almost all chapter 3 wiring methods are acceptable in a typical dwelling unit, NM is just the most common and usually the least expensive method to install.
 
kwired said:
If it is marked THW then it can be used outside the well casing, but still would need to be in a raceway or wireway - it is not a listed stand alone cable assembly.

334.10 tells us where NM cable is permitted, it does not tell us that dwellings are limited to using only NM cable. In fact almost all chapter 3 wiring methods are acceptable in a typical dwelling unit, NM is just the most common and usually the least expensive method to install.
Click to expand...

Or looked at from the other side, you CAN use NM, but not EXCLUSIVELY. If you use other types, it would have to be in a proper raceway. NM just allows you to run inside of protected spaces, like walls and ceilings, WITHOUT additional raceway.

THW can be run in raceway, but JACKETED (Multiconductor) Cable cable must be de-rated for temperatures over 30C (86F), even though the insulation rating is 75C. So in a wall or ceiling, that's very likely going to be the case. Take a look at the applicable issues in 310.15. If even adjusted for 104F use inside of a wall, you are down to 75% rated current.
 
Et All,

Review UL WhiteBook "ZLGR" for Submersible Pump Cable information.

"Indicates multiconductor cable consisting of two or three or two to six twisted insulated conductors with or without an overall jacket. The cable is labeled in size 14 - 500 kcmil CU, and 12 AWG to 500 kcmil AL to 500 Kcmil copper-clad Al. The cable (again multiconductor or twisted insulated conductors) is tag marked " For Wiring Only Between Equipment Located at Water well Heads and Motor of Insalled Deep-Well Submersible Pumps"...with an insulation surface marking of "Submersible Pump Cable".

Cables with test markings have not be evaluated for direct burial in the earth..just in the well.
7 Deep-well submersible water pump cable
7.1 General
The construction of deep-well submersible water pump cable shall consist of assemblies comprising two
or more insulated circuit conductors having a wet rating, and an optional insulated equipment grounding
conductor, with or without an overall jacket. These cables shall be of the twisted or parallel configuration
with the option of having a low temperature rating of ?40?C.


7.2 Construction


7.2.1 Conductors
Circuit conductors shall consist of solid or stranded 2.08 ? 33.6 mm2 (14 ? 2 AWG) copper, solid or
stranded 3.31 ? 33.6 mm2 (12 ? 2 AWG) aluminum ACM, or stranded 42.4 ? 253 mm2 (1 AWG ? 500
kcmil) copper or aluminum ACM. The optional insulated equipment-grounding conductor shall be of the
same construction as the circuit conductor, and of a size that is not smaller than indicated in Table 28,
except that a copper equipment-grounding conductor shall be allowed with aluminum circuit conductors,
as described in Table 28. An aluminum equipment-grounding conductor shall be allowed with copper
circuit conductors, as described in Table 29. All of the conductors shall comply with Clause 4.1.


7.2.2 Insulation
Insulated conductors of the types listed in Groups I, II, and III of Table 30, assemblies a), b), and d) of
Clause 7.2.3, shall comply with the requirements of Clauses 1 ? 6 of this Standard. Insulated conductors
of the types listed in Groups I and III, assembly c), shall have an integral insulation-jacket consisting of
the sum of the thickness of insulation of Table 10 corresponding to the types listed, plus the thickness of
integral jacket from Table 31.


Long story short...on Thermoplastic...if it is submersible well pump cable it will say it on the cable...but it is more than likely if it is twisted then it is THHN/THWN-2 and if it is the flat cable it is THW or THW-2 for the most part.

If you are using Thermoset....Then see UL Whitebook "ZKST" as it has different language that is to be applied to the cable. The cable is tag marked as "For use within the well casing for wiring deep-well water pumps where the cable is not subject to repetitive handling caused by frequent servicing of the pump units". Many companies make a triple rated product with a label on the reel that also is rated as USE-2 which is the only option if you are not going to use a raceway outside of the well casing unless you use UF Cable....which is UL Whitebook YDUX...and it also has the marking requirements...

As for the Type NM Cable references.....unless you change over somewhere you know Type NM can't be outside in a raceway....but you could run UF Cable from well to dwelling.....or any of the other permitted conductors with appropriate listings and markings in raceways within the dwelling of course.

Hope this helps..if not...Sorry.
 
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