Richards Thermocouple and Temperature Sensor Catalog 16

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Extension Wire - Insulated

Richards Extension wire is used to complete the circuit from the thermocouple element to the temperature instrument. The extension wire and the thermocouple wire must both be of the same calibration type to maintain the accuracy of the thermocouple. The polarity of each set of wires must also be maintained during the installation or errors will be introduced into the circuit. The RED wire is always the NEGATIVE leg of the exten- sion wire. Extension wire is also color coded to help with identification and installation. See the extension wire color coding chart in this catalog and the coding under the tables. If the wire will be subject to repeated flexing, a stranded wire should be used to prevent conductor breakage. To specify stranded conductors, add a S to the end of the part number. For typical, non-flexing, ambient temperatures, indoor use, a 20 gauge (1.3 mm) solid conductor with PVC (Polyvinyl Plastic) insulation wire is an excellent choice. This wire is low cost and resistant to oils, chemicals, abra- sion, moisture, and acids. Never install extension wire in the same conduit as power lines. This will cause interference and errors in the tempera- ture readings. It is a good practice to keep the extension wire at least 1 foot away from power lines to maintain an accurate thermocouple circuit. Thermocouple extension wire can be supplied on spools or coils. Wire orders will be spooled plus or minus 10% of the quantity unless otherwise specified by the customer and indicated on the purchase order. If you require spooled wire just specify the part number and the footage. The exten- sion wire part numbers below, specify the wire gauge, Type, and insulation material. Example: 50 Feet of 24JX-TT ( in 24JX-TT-ex the “ex” indi- cates “extruded” Teflon ® ) ! Notes: Special limits can be specified by doubling the type letter in the part number. Example: 20KKX-TT Stainless steel Over Braid is available for many wires. It is used to protect from abrasion and fraying of wires and as an electric shielding when grounded. Eight is the designation for 304 Stainless Steel - “ OB8 ”; It is just added to the end of the part number. Example: 20JX-GG-OB8 Nickel vs. Nickel Moly thermocouples - can use Type KX extension wire at room temperature . Type C thermocouples - can use Type RSX at room temperatures.

Type B thermocouples - can use ordinary copper wire for extension wire at room temperatures. Type P (Platinel II) thermocouples - can use Type KX extension wire at room temperature.

Type BX - Extension Wire

Part

Wire

Jacket

Max.

Lbs./

Kgs,/

Nominal Size

Number

Gauge Form

Insulation

°F

°C

1000 Kilometer Inches

20BX-TT

Solid Teflon TFE (Fused Tape) Teflon TFE (Fused Tape)

400

204

10.0

14.9

.12 x .06 3.1 x 1.5

Color Code: Gray (Positive, Non-magnetic, Copper Manganese and Red (Negative, Non-magnetic, Copper) Outer jacket - Gray .

Type EX - Extension Wire

Part

Wire

Jacket

Max.

Lbs./

Kgs,/

Nominal Size

Number

Gauge Form

Insulation

°F

°C

1000 Ft. Kilometer Inches

16EX-PP 16EX-TT

16 16

Solid Solid

Polyvinyl Plastic Teflon TFE (Fused Tape)

220 400

104 204

25.0 25.0

37.2 37.2

.20 x .13 .16 x .10

5.1 x 3.3 4.1 x 2.5

20E-GG * 20EX-PP

20 20

Solid Solid

Fiberglass, Impregnated Polyvinyl Plastic

400 220

204 104

7.7 12.5

11.5 18.6

.09 x .06 .16 x .10

2.3 x 1.5 4.1 x 2.5

Color Code: Purple (Positive, Non-magnetic, Nickel, 10% Chromium) and Red (Negative, Non-magnetic, Constantan) Outer jacket - Purple . * Thermocouple Grade quality - Overall Brown , if tracer - Purple .

Type JX - Extension Wire

Part

Wire

Jacket

Max. Max. Lbs./

Kgs,/

Nominal Size

Number

Gauge

Form

Insulation

°F

°C

1000 Kilometer Inches

14JX-PP

Solid

Polyvinyl Plastic

220

104

34.5

51.3

.22 x .15 5.6 x 3.8

16JX-GG 16JX-GG-S

16 16 16 16 20 20 20 20 20

Solid Stranded

Fiberglass, Impregnated Fiberglass, Impregnated Polyvinyl Plastic Teflon TFE (Fused Tape) Fiberglass, Impregnated Polyvinyl Plastic Polyvinyl Plastic Teflon TFE (Fused Tape) Teflon FEP (Extruded)

400 400 220 400 900 220 220 500 400

204 204 104 204 480 104 104 260 204

17.9 20.8 25.0 25.0 7.7 12.5 14.0 10.0 11.0

26.6 31.0 37.2 37.2 11.5 18.6 20.8 14.9 16.4

.15 x .09 .16 x .10 .20 x .13 .16 x .10 .09 x .06 .16 x .10 .19 x .11 .11 x .06 .12 x .07

3.8 x 2.2 4.1 x 2.5 5.1 x 3.3 4.1 x 2.5 2.3 x 1.5 4.1 x 2.5 4.7 x 2.7 2.7 x 1.6 3.1 x 1.8

16JX-PP 16JX-TT

Solid Solid

20J-GG * 20JX-PP 20JX-PP-S 20J-TT * 20JX-TT-ex

Solid Solid Stranded

Solid Solid

Color Code: White (Positive, Magnetic, Iron) and Red (Negative, Non-magnetic, Constantan) Outer jacket - Black . * Thermocouple Grade quality - Overall Brown , if tracer - Black or White.

Page 120

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