SIS Wire

Name: SIS Wire
Brand: KrisTech
SKU: sis-wire

Electrical Utility and Distribution Building Wire

SIS Wire, also known as Switchboard or Panelboard wire, is a type of building wire typically made with a tin-coated copper conductor insulated with thermoset cross-linked polyethylene (XLPE). The conductors are stranded for high flexibility, making installation in tight spaces easier, and are tinned to facilitate soldering.

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Sunlight Resistant

Oil & Gas Resistant

1000 V Maximum Voltage

KrisTech’s dual-rated SIS/XHHW wire consists of a single Class K-stranded conductor made of tin-coated copper. SIS conductors are most often used in switchboards and panel boards as specified in the National Electrical Code. Although SIS is not recognized in the NEC Article 310 for use in conduit, KrisTech’s is dual-rated as XHHW-2 and is approved for use in recognized raceways. Final approval always rests with your local electrical inspector.

Its VW-1 rating also makes it suitable for switchboards, panel boards, control panels, automobile factories, programmable logic controllers (PLCs), variable frequency drives (VFDs), and other industrial applications.

SIS/XHHW wire can safely operate in temperatures ranging from -40°C to 90°C in wet locations and -40°C to 105°C in dry locations.

Standard Products

Sizes #14 through #4/0 AWG
Standard Highly Flexible Tinned Stranding
Standard insulation is Gray XLPE, VW-1 Rated

Additional Options

#18 and #16 AWG constructions (non-UL)
7-strand count available on request

KrisTech’s SIS wire meets the following standards and tests, including:

ASTM B-33
UL 44
CSA C22.2 NO. 38-10
NEC NFPA 70, NEC 310

Conductors – Single conductors are available in solid or stranded and annealed or hardened configurations. Tin-coated copper conductors are standard in SIS constructions.
Insulation – Conductors are insulated with a concentrically applied gray XLPE (crosslinked polyethylene) that is VW-1 flame and “Oil and Gasoline Resistant I” rated. An optional non-VW-1 flame rating is available on request. CT (FT4) rating in sizes #1/0 and larger is also available upon request. All black insulation is rated “Sunlight Resistant.” All colored insulation is rated “Sunlight Resistant” in sizes #6 AWG and larger, and optional in sizes #8 AWG and smaller.

Print legends on the wire include the manufacturer, conductor size, voltage rating, UL symbol (if applicable), and type designation. Standard length spools are 500 or 2,500 feet.

Print Legend – KRIS-TECH WIRE CO. #XX AWG TYPE SIS OR XHHW-2 600V AND 1000V 90C VW-1 (UL) ROHS

Paralleling & Cabling

Multiple wire runs on a single reel

Dyeing

Change the color of single PVC insulated conductors

Striping

Parallel and cylindrical/twist striping for insulated single-conductor wire

Wire Identification

Custom print legends and choice of 10 insulation colors

Custom Lengths

Coils and reels cut to length

Labeling & Packaging

Product labels, shipment ID markers, optional knock-out boxes

Specifications

AWG	Standard Number of Strands	Optional Stranding***	Insulation Thickness (Mils)	Ampacity @ 90°C*	Nominal Overall Diameter-Inches (Standard Strands)	Approx Shipping Wgt. (Lbs./1000')
18**	16	-	30	14	0.11	9
16**	26	-	30	18	0.12	13
14	41	7, 19	30	25	0.13	18
12	65	7, 19	30	30	0.15	27
10	105	7, 19	30	40	0.18	40
8	133	7, 19	45	55	0.26	70
6	133	7, 19	45	75	0.30	104
4	133	7, 19	45	95	0.35	157
2	133	7, 19, 259	45	130	0.41	234
1	133	19, 37, 259	55	145	0.46	330
1/0	133	19, 37, 259	55	170	0.54	378
2/0	133	19, 37, 259	55	195	0.57	466
3/0	133	19, 37, 259	55	225	0.64	579
4/0	133	19, 37, 259	55	260	0.70	721

*Ampacity is from NEC Article 310. Check with local codes authority for guidance with your application.
**Non-UL product.
***This stranding may require a Minimum Order Quantity, please contact KrisTech Sales for more information.