Name: UL 1333 FEP Wire 150°C 300V, Stranded or Solid Tinned Copper
Brand: TEBAOFLEX

Product overview

UL 1333 is the UL wire style for 300 V, 150 °C wire with FEP insulation. TEBAOFLEX builds it with a 0.33 mm FEP fluoropolymer wall over tinned copper, from 10 AWG to 30 AWG, with stranded conductors across the range and solid conductors in 20, 22, 24, 26, 28 and 30 AWG. Overall diameters run from 0.914 mm to 3.67 mm with a tolerance of ±0.1 mm.

Choose UL 1333 for internal wiring of home appliances, lighting lamps, small motors, temperature sensors and electronic equipment where a thin, flexible insulation with strong chemical resistance is needed. The low-friction FEP surface and good electrical properties suit dense wiring, and eleven insulation colours, including transparent, help with circuit identification.

Browse the UL style wire category for the other PTFE, FEP, silicone and XLPE styles or download the UL 1333 datasheet (PDF).

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Application & Features

Selection overview

UL 1333 is used for internal wiring and leads in home appliances, lighting lamps, small motors, temperature sensors and electronic equipment. In lamp housings and appliance enclosures the wiring sits close to warm components, and the thin 150 °C FEP wall routes easily through compact spaces. Solid conductors in the small sizes suit fixed connections on boards and sensors, while the stranded versions take the flexing of leads that move.

Within the TEBAOFLEX FEP range, compare UL 1332 for 300 V FEP lead wire rated 200 °C, and UL 1331 for a 600 V, 150 °C FEP hook-up wire. Where PTFE insulation is preferred at 300 V and 150 °C, see UL 1164 with silver-plated copper.

Thin FEP wallA 0.33 mm FEP wall gives overall diameters from 0.914 mm at 30 AWG to 3.67 mm at 10 AWG.
Stranded or solidStranded tinned copper in every size, plus solid conductors from 20 AWG to 30 AWG.
Chemical resistanceFEP insulation with strong chemical resistance and good electrical properties.
Eleven coloursRed, black, yellow, green, blue, white, purple, brown, orange, grey and transparent.

Studio theatre lighting rig with spotlights hung from black trusses above blue curtains, lighting lamps whose internal wiring uses 150 °C FEP wire such as UL 1333 — Stage spotlights pack lamps and control electronics into compact housings that run warm for hours, where thin 150 °C FEP wire is used for internal connections (labels blurred). Photo: Rodw, CC BY-SA 4.0, via Wikimedia Commons.

Specifications

Technical data

Nominal values for UL 1333 constructions; overall diameter tolerance ±0.1 mm. The final construction is confirmed on the TEBAOFLEX datasheet issued with your quotation.

Electrical, thermal and material data

Parameter	Value
Voltage rating	300 V
Temperature range	−80 °C to 200 °C / 150 °C
Conductor	Tinned copper
Insulation	FEP fluoropolymer
Protection	FEP insulation with strong chemical resistance
Performance	Flexible wire with low friction and good electrical properties
Colours	Red, black, yellow, green, blue, white, purple, brown, orange, grey and transparent
O.D. tolerance	±0.1 mm
Wire style	UL 1333 / UL 1332 style FEP wire
Application	Home appliances, lamps, motors, sensors and electronic equipment

Dimensions and electrical properties

AWG	Conductor stranding	Cond. dia. mm	Insulation thickness	Approx. O.D. mm	Resistance ohm/km	Temp.
10	37 x 0.43	3.01	0.33	3.67	3.546	150 °C
12	19 x 0.49	2.45	0.33	3.11	5.64	150 °C
14	19 x 0.37	1.85	0.33	2.51	8.96	150 °C
16	19 x 0.30	1.50	0.33	2.16	14.6	150 °C
17	19 x 0.26	1.30	0.33	1.96	18.3	150 °C
18	19 x 0.23	1.15	0.33	1.81	23.2	150 °C
20	19 x 0.18	0.90	0.33	1.56	36.7	150 °C
20	1 x 0.80	0.80	0.33	1.46	35.2	150 °C
22	19 x 0.16	0.80	0.33	1.46	59.4	150 °C
22	1 x 0.65	0.65	0.33	1.31	56.4	150 °C
24	7 x 0.20	0.60	0.33	1.26	94.2	150 °C
24	1 x 0.50	0.50	0.33	1.16	89.3	150 °C
26	7 x 0.16	0.48	0.33	1.14	150.0	150 °C
26	1 x 0.40	0.40	0.33	1.06	143.0	150 °C
28	7 x 0.12	0.36	0.33	1.02	239.0	150 °C
28	1 x 0.32	0.32	0.33	0.98	227.0	150 °C
30	7 x 0.10	0.30	0.33	0.96	381.0	150 °C
30	1 x 0.254	0.254	0.33	0.914	361.0	150 °C

Selection note: Rows with a single wire (1 x) are solid conductors. Before ordering, ask our engineers to confirm the reference temperature for the resistance values, the minimum bending radius, the current rating for your installation, any flame-test marking and the put-up lengths you need.

Standards & References

Applicable standards and compliance

Wire styleUL 1333 FEP wire, 300 V and 150 °C, for electrical and electronic use.
ConductorTinned copper: 37 strands at 10 AWG, 19 strands from 12 AWG to 22 AWG, 7 strands from 24 AWG to 30 AWG, and solid wire from 20 AWG to 30 AWG, as listed in the size table.
DimensionsA nominal 0.33 mm insulation wall on every size, with an overall diameter tolerance of ±0.1 mm.
ApprovalsUL style, CSA and flame-test markings for your order are confirmed and quoted per order.

Construction

Material and build-up

UL 1333 is a single-conductor wire with two layers: a tinned copper conductor, stranded or solid, and one FEP fluoropolymer wall.

Conductor: tinned copper, stranded with 37, 19 or 7 wires depending on size, or solid from 20 AWG to 30 AWG; the tin coating protects the copper surface.
Insulation: FEP fluoropolymer with a nominal 0.33 mm wall, strong chemical resistance, low friction and good electrical properties.
Colours: red, black, yellow, green, blue, white, purple, brown, orange, grey or transparent insulation for circuit identification.
Tolerance: overall diameter ±0.1 mm on the nominal values in the size table.

FAQ

Selection questions

What is UL 1333 wire?

UL 1333 is a UL wire style for 300 V, 150 °C wire with FEP insulation. The TEBAOFLEX version uses a 0.33 mm FEP wall over stranded or solid tinned copper, from 10 AWG to 30 AWG, for appliances, lighting, small motors, sensors and electronic equipment.

How is UL 1333 different from UL 1332 and UL 1331?

All three use FEP insulation over tinned copper. UL 1333 is rated 300 V and 150 °C. UL 1332 is a 300 V lead wire rated 200 °C, and UL 1331 is a 600 V hook-up wire rated 150 °C. Choose by the voltage and temperature your circuit needs.

When should I choose a solid conductor?

Solid tinned copper is offered from 20 AWG to 30 AWG. It suits fixed connections such as sensor leads and board wiring; for leads that move or vibrate, choose the stranded construction of the same size.

What insulation thickness and diameter does UL 1333 have?

Every size has a 0.33 mm FEP wall. Overall diameters run from 0.914 mm (30 AWG solid) to 3.67 mm (10 AWG, 37 strands), with a tolerance of ±0.1 mm.

What should I send for a quotation?

Send the UL style, AWG size, stranded or solid conductor, insulation colour, put-up length, quantity and any UL, CSA or flame-test marking requirement. Our engineers confirm the construction on the datasheet issued with your quotation.

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Send the UL style, AWG size, stranded or solid conductor, insulation colour, put-up length, quantity and marking requirement, and we will confirm the construction and quote.

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UL 1333 FEP Wire 150°C 300V, Stranded or Solid Tinned Copper

Application & Features