UL 3257 Silicone Ignition Wire, 250°C 10kV AC / 25kV DC
UL 3257 is a UL-certified silicone ignition wire rated 250°C, 10 kV AC and 25 kV DC. The stranded nickel-plated copper construction is intended for internal high-voltage leads, with separate voltage ratings for AC and DC circuits.
- Voltan: 10 kV AC / 25 kV DC
- Suhu: 250°C
- Penebat / lapisan luar: extruded silicone rubber
- Pemilihan saiz: 22–12 AWG
- Pensijilan: AWM diperakui UL; UL 758
UL 3257 wire selection
UL 3257 is a UL-certified silicone ignition wire rated 250°C, 10 kV AC and 25 kV DC. The stranded nickel-plated copper construction is intended for internal high-voltage leads, with separate voltage ratings for AC and DC circuits.
Two silicone wall options are listed across 22–12 AWG: 5/64 in and 7/64 in. The larger wall increases the finished diameter, weight and minimum bend radius even when the conductor size stays the same. The two complete tables make that difference visible, so an ignition lead can be selected against the terminal boot, entry opening and available bend space rather than by AWG alone.
For burner or oven ignition assemblies, record the waveform and operating voltage before choosing the construction. Protect the lead from repeated flexing and use terminations that suit the full voltage and temperature duty. The silicone construction is not intended for immersion. Where a thicker wall is requested, make sure the assembly drawing also allows the larger outside diameter and bend radius.
Lihat tab Spesifikasi untuk jadual model dan saiz. Terokai kategori Rangkaian kabel suhu tinggi for related constructions. Compare the construction of wayar silikon voltan tinggi when the duty is a high-voltage equipment lead rather than an igniter.
Binaan
UL 3257 uses the following conductor and insulation system. The diagram illustrates the layer sequence; select the conductor construction and covering shown in the required size specification.
| Komponen | Butiran binaan |
|---|---|
| Pengalir | Stranded 2% nickel-plated copper |
| Penebat | Getah silikon tersemperit |
| Wall options | 5/64 in standard or 7/64 in thicker wall |
Aplikasi
UL 3257 suits internal ignition and high-voltage lead connections in burners, ovens and related equipment. The wire must be installed without flexing in service, with terminal insulation and clearances appropriate to the circuit.
UL 3257 replacement selection
Untuk pertanyaan penggantian, berikan penandaan wayar sedia ada dan lukisan sambungan peralatan supaya pengalir, penebat dan susunan terminal dapat dipadankan.
Spesifikasi
| Parameter | Spesifikasi |
|---|---|
| Gaya UL | UL 3257 |
| Kadaran voltan | 10 kV AC / 25 kV DC |
| Kadaran suhu | 250°C |
| Penebat / penutup | extruded silicone rubber |
| Julat saiz pengalir | 22–12 AWG |
| AC voltage rating | 10,000 V AC |
| DC voltage rating | 25,000 V DC |
| Minimum average / point silicone wall | 78 / 70 mils |
| Temperature range in supplied construction | −60°C to 250°C |
| Pemasangan | Internal wiring without flexing; not for immersion |
| Model, size and silicone wall | Lembar | OD (mm) | OD (in) | Berat (kg/km) | Weight (lb/1000 ft) | Jejari lenturan minimum (in) |
|---|---|---|---|---|---|---|
| UL 3257 22 AWG — 5/64 in | 7 | 4.83 | 0.190 | 26.52 | 18 | 1.52 |
| UL 3257 20 AWG — 5/64 in | 7 | 5.00 | 0.197 | 29.41 | 20 | 1.58 |
| UL 3257 18 AWG — 5/64 in | 19 | 5.18 | 0.204 | 33.38 | 22 | 1.63 |
| UL 3257 16 AWG — 5/64 in | 26 | 5.51 | 0.217 | 40.73 | 27 | 1.74 |
| UL 3257 14 AWG — 5/64 in | 41 | 5.89 | 0.232 | 50.85 | 34 | 1.86 |
| UL 3257 12 AWG — 5/64 in | 65 | 6.35 | 0.250 | 66.58 | 45 | 2.00 |
| Model, size and silicone wall | Lembar | OD (mm) | OD (in) | Berat (kg/km) | Weight (lb/1000 ft) | Jejari lenturan minimum (in) |
|---|---|---|---|---|---|---|
| UL 3257 22 AWG — 7/64 in | 7 | 6.45 | 0.254 | 45.26 | 30 | 2.03 |
| UL 3257 20 AWG — 7/64 in | 7 | 6.63 | 0.261 | 48.70 | 33 | 2.09 |
| UL 3257 18 AWG — 7/64 in | 19 | 6.81 | 0.268 | 53.26 | 36 | 2.14 |
| UL 3257 16 AWG — 7/64 in | 26 | 7.14 | 0.281 | 61.69 | 41 | 2.25 |
| UL 3257 14 AWG — 7/64 in | 41 | 7.52 | 0.296 | 73.09 | 49 | 2.37 |
| UL 3257 12 AWG — 7/64 in | 65 | 7.98 | 0.314 | 90.40 | 61 | 2.51 |
Pemilihan binaan yang ditetapkan
Use UL 3257 plus AWG and wall option on the order. State 10 kV AC or 25 kV DC duty explicitly and compare the corresponding OD and minimum bend radius before choosing a boot or gland.
Piawaian
TEBAOFLEX UL 3257 wire is UL-certified appliance wiring material.
| Perkara | Keperluan atau rujukan |
|---|---|
| Pensijilan | AWM diperakui UL |
| Penetapan gaya | UL 3257 |
| Piawaian binaan | UL 758 — Bahan Pendawaian Peralatan |
| Pengelasan nyalaan bagi gaya | Ujian nyalaan mendatar |
Nyatakan gaya UL, saiz pengalir serta penarafan voltan dan suhu dalam spesifikasi pembelian. Sertakan pengenalan produk dan dokumen pensijilan yang diperlukan bersama pertanyaan.
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