C1D1 VFD Cable

C

ChetChelios

Member
Location
Sacramento
Occupation
Engineer
Hello, we are having trouble finding a VFD cable that is rated for C1D1.
We cant use conduits because the system is on a skid and the vfd panel will not be on the skid so the VFD cable needs to be rated for c1d1.
Thank you
 
rbalex said:
Try NEC Section 501.10(A)(7). There are other options in Section 501.10(A) as well.
Click to expand...
I should rephrase my question because we understand conduit and sealing requirements for c1d1 areas.

In this application there will be a skid with a pump.
The pump will have a coil of vfd cable that needs to plug into a motor panel that will not be on the skid.
Since the skid is mobile we cannot use conduit between the vfd and motor.
We are looking for a VFD cable that is rated to be in the C1D1 environment without a conduit.
Thanks
 
Type TC-ER-HL sealing requirements are outlined in Section 501.15(D); especially Subsections 501.15(D)(1) and (2).
Several manufacturers make it. It can also come shielded with sectioned grounding conductors to make it VFD friendly. Contact a manufacturer.
Type MC-HL is also available from several manufacturers. It too can be made VFD friendly.
Neither Type is likely to be in a local warehouse. You will probably have to contact a specialty cable supply house or the manufactures directly.
Both Types must still recognize their respective Articles (330 & 336) as well as Article 501.
“Temporary” installations still must generally follow the applicable NEC requirements[See Section 590.2]
 
rbalex said:
Type TC-ER-HL sealing requirements are outlined in Section 501.15(D); especially Subsections 501.15(D)(1) and (2).
Several manufacturers make it. It can also come shielded with sectioned grounding conductors to make it VFD friendly. Contact a manufacturer.
Type MC-HL is also available from several manufacturers. It too can be made VFD friendly.
Neither Type is likely to be in a local warehouse. You will probably have to contact a specialty cable supply house or the manufactures directly.
Both Types must still recognize their respective Articles (330 & 336) as well as Article 501.
“Temporary” installations still must generally follow the applicable NEC requirements[See Section 590.2]
Click to expand...
Thanks for the feed back. we have been in contact with most of the major manufacturers who all state that they only make c1d2 VFD cable. We did find literature online for one or two others and we are trying to get ahould of their reps or distributors but it is a long process.
 
It is indeed a time-consuming process. I did a web search on TC-ER-HL and found several potential suppliers. One that even specifically stated the product was suitable for Class I, Division 1.

Nevertheless, you may be forced into a Section 500.8(A)(3) situation. Look it up; it can be interesting. You get to do real engineering.
 
I recently needed the same TC-ER-HL VFD power cable for a C1D1 location. What I found was Prymsian AirGuard 20260539, sold by Priority Wire Cable as 14-03VFDAG-OS. About $5/ft. This is for 3x 14ga conductor and 3x 18ga ground wires, the smallest they make in this series.
 
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