Richards Thermocouple and Temperature Sensor Catalog 16

Type BX - Extension Wire

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

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 (

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 JX - Extension Wire

Part

Wire

Jacket

Max.

Lbs./

Kgs,/

Nominal Size

Number

Gauge Form

Insulation

°F

°C

1000 Ft. Kilometer Inches

16EX-PP

16EX-TT

Solid

Polyvinyl Plastic

Teflon TFE (Fused Tape)

Polyvinyl Plastic

Teflon TFE (Fused Tape)

220

400

104

204

25.0

37.2

.20 x .13

.16 x .10

5.1 x 3.3

4.1 x 2.5

20E-GG *

20EX-PP

Solid

Fiberglass, Impregnated

Polyvinyl Plastic

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

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

16JX-PP

16JX-TT

Solid

Stranded

Solid

Fiberglass, Impregnated

Polyvinyl Plastic

Teflon TFE (Fused Tape)

Fiberglass, Impregnated

Polyvinyl Plastic

Teflon TFE (Fused Tape)

400

220

400

204

104

204

17.9

20.8

25.0

26.6

31.0

37.2

.15 x .09

.16 x .10

.20 x .13

.16 x .10

3.8 x 2.2

4.1 x 2.5

5.1 x 3.3

4.1 x 2.5

20J-GG *

20JX-PP

20JX-PP-S

20J-TT *

20JX-TT-ex

Solid

Stranded

Solid

Fiberglass, Impregnated

Polyvinyl Plastic

Teflon TFE (Fused Tape)

Teflon FEP (Extruded)

Fiberglass, Impregnated

Polyvinyl Plastic

Teflon TFE (Fused Tape)

Teflon FEP (Extruded)

900

220

500

400

480

104

260

204

7.7

12.5

14.0

10.0

11.0

11.5

18.6

20.8

14.9

16.4

.09 x .06

.16 x .10

.19 x .11

.11 x .06

.12 x .07

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

Color Code: White

(Positive, Magnetic, Iron) and

Red

(Negative, Non-magnetic, Constantan) Outer jacket -

Black

* Thermocouple Grade quality - Overall

Brown

, if tracer -

Black

White.

Type EX - 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

Extension Wire - Insulated

Page 120

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