Class K
Class K welding cable combines flexible stranded copper conductors with a rubber insulating cover for welding-circuit connections. The construction supports handling and routing between compatible welding equipment, electrode leads and work-return connections. Class K stranding provides a commonly specified flexible conductor arrangement for welding leads. Conductor size and lead length are matched to welding current, duty cycle and connection hardware. The selected cover and product markings establish temperature capability and permitted exposure, with other power applications requiring the corresponding cable approvals.
Available Sizes
12 sizes in stock, cut to length. Click a size to start your quote.
Construction & Ratings
Conductor
Insulation
Voltage Rating
Temperature Rating
Available Insulation Colors
6 color options in stock. Custom striping and ID print available on request.
Class K Part Numbers
22 Class K part numbers stocked or sourced by Mid America Wire & Cable. Open a part number for its details, or request a quote for the size and length you need.
| Part Number | Description | Unit Weight (lbs) |
|---|---|---|
| 30A-0010 | 1/0 Class K Welding Cable 600 Volt Black | 0.46 |
| 30A-0010-02 | 1/0 Class K Welding Cable 600 Volt Red | 0.46 |
| 30A-0010-04 | 1/0 Class K Welding Cable 600 Volt Yellow | 0.46 |
| 30A-0010-06 | 1/0 Class K Welding Cable 600 Volt Blue | 0.46 |
| 30A-0020 | 2/0 Class K Welding Cable 600 Volt Black | 0.56 |
| 30A-0020-04 | 2/0 Class K Welding Cable 600 Volt Yellow | 0.56 |
| 30A-0030 | 3/0 Class K Welding Cable 600 Volt Black | 0.65 |
| 30A-0040 | 4/0 (2109) Class K Welding Cable 600 Volt Black | 0.76 |
| 30A-0040-02 | 4/0 (2109) Class K Welding Cable 600 Volt Red | 0.76 |
| 30A-0040-04 | 4/0 (2093) Class K Welding Cable 600 Volt Yellow | 0.76 |
| 30A-0040-05 | 4/0 (2109) Class K Welding Cable 600 Volt Green | 0.76 |
| 30A-0101 | #1 Class K Welding Cable 600 Volt Black | 0.36 |
| 30A-0201 | #2 Class K Welding Cable 600 Volt Black | 0.30 |
| 30A-0201-04 | #2 Class K Welding Cable 600 Volt Yellow | 0.30 |
| 30A-0301 | 3 Class K Welding Cable 600 Volt Black | 0.27 |
| 30A-0401 | #4 Class K Welding Cable 600 Volt Black | 0.21 |
| 30A-0401-02 | #4 Class K Welding Cable 600 Volt Red | 0.21 |
| 30A-0401-05 | #4 Class K Welding Cable 600 Volt Green | 0.21 |
| 30A-0601 | #6 Class K Welding Cable 600 Volt Black | 0.15 |
| 30A-0601-02 | #6 Class K Welding Cable 600 Volt Red | 0.15 |
| 30A-0801 | 8(168) Class K Welding Cable 600 Volt Black | 0.09 |
| 30A-0801-02 | 8(168) Class K Welding Cable 600 Volt Red | 0.09 |
Class K Questions and Answers
What size welding cable do I need for a 200 amp welder?
#2 AWG up to 50 feet of total lead, #1 at 75 feet, 2/0 at 100 feet, and 3/0 at 125 to 150 feet. Step up for longer runs. The welding cable ampacity chart covers 100 to 600 amps.
What is the difference between Class K and Class M welding cable?
Class K (30 AWG strands) is the industry standard and handles most welding jobs. Class M (34 AWG strands) is more flexible, worth it for robotic welding, tight bends or daily heavy use. We stock both.
How do I work out the lead length?
Add the electrode lead and the work lead together. A pair of 50-foot leads is a 100-foot circuit, and voltage drop grows with every foot, so longer leads and heavier duty cycles both call for bigger cable.
Can welding cable be used in conduit or as building wire?
Usually not. Most welding cable carries no UL listing, so it is not code-recognized for installation in conduit or cable tray; it belongs on welder secondary circuits (NEC Article 630). For fixed installations that need the same flexibility, use a listed cable such as DLO or Type W.
Can I use DLO instead of welding cable?
Yes. DLO meets or exceeds every welding cable rating. It is slightly stiffer, but many shops prefer it for durability. See DLO vs welding cable.
Something else? Call (918) 622-1489 or send us the size and length you need.