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UL94
Resistance to Ignition and Tracking Properties
Performance may be investigated with respect to electrical track resistance, ability to resist ignition from electrical sources, and other electrical properties. In order to avoid an excessive level of implied precision and bias, material performances for several tests are recorded as Performance Level Categories (PLC), based on the mean test results (rather than recording the exact numerical results), as indicated in the table following the test description.
Hot-wire Ignition (HWI; ASTM D3874, IEC 60695-2-20) — Performance is expressed as the mean number of seconds needed to ignite standard specimens (if the material ignited). An HWI PLC 0 may be due to all the test specimens melting away without any ignition.
HWI Range
Mean Ignition Time (in sec) Assigned
PLC
120 and longer 0
60 through 119 1
30 through 59 2
15 through 29 3
7 through 14 4
Less than 7 5
High-current-arc Ignition (HAI; ANSI/UL 746A) — Performance is expressed as the number of arc-rupture exposures (standardized as to electrode type and shape and electric circuit) that are necessary to ignite a material when they are applied at a standard rate on the surface of the material.
HAI Range
Mean Number of Arcs
to Cause Ignition Assigned
PLC
120 and greater 0
60 through 119 1
30 through 59 2
15 through 29 3
Less than 15 4
High-voltage-arc Tracking Rate (HVTR; ANSI/UL 746A) — Denoted as the rate, in mm/min, that a tracking path can be produced on the surface of the material under standardized test conditions. A notation is made if ignition on the material takes place. The results of testing the nominal 3 mm thickness are considered representative of the material's performance in any thickness.
HVTR Range
(in mm/min) Assigned
PLC
0 through 10 0
10.1 through 25.4 1
25.5 through 80 2
80.1 through 150 3
Greater than 150 4
High-voltage, Low-current-arc Resistance (D495; ASTM D495) — Expressed as the number of seconds that a material resists the formation of a surface-conducting path when subjected to an intermittently occurring arc of high-voltage, low-current characteristics. The results of testing the nominal 3 mm thickness are considered representative of the material's performance in any thickness.
D495 Range
Mean Time of Arc Resistance
(in sec) Assigned
PLC
420 and longer 0
360 through 419 1
300 through 359 2
240 through 299 3
180 through 239 4
120 through 179 5
60 through 119 6
Less than 60 7
Comparative Tracking Index (CTI; ASTM D3638) — Expressed as that voltage which causes tracking after 50 drops of 0.1% ammonium chloride solution have fallen on the material. The results of testing the nominal 3 mm thickness are considered representative of the material's performance in any thickness.
CTI Range
Tracking Index
(in volts)
Assigned
PLC
600 and greater 0
400 through 599 1
250 through 399 2
175 through 249 3
100 through 174 4
Less than 100 5
The above characteristics and dielectric strength, volume resistivity and other electrical and mechanical properties may be determined by means of the applicable ASTM and/or UL specification in ANSI/UL 746A, "Polymeric Materials - Short Term Property Evaluations."
In addition to minimum electrical and ignition test levels, materials that are used in applications involving support or contact with current-carrying parts are also required to display a minimum stability (heat distortion, moisture resistance, dimensional stability and mold stress) performance level, as described in ANSI/UL 746C.
代理范围:
(一)水平燃烧测试,94HB,并指导前期打样送测;
(二)垂直燃烧测试,94V-2,94V-1,94V-0,并指导前期打样送测;
电子线UL758认证，灯具UL认证，电线电缆UL认证，QMMY2 UL746D注塑件认证，UL969 PGDQ2标签认证，连接器UL认证，灯饰CCC认证，线路板组装VZQC2认证，UL969 PGAA标签认证，UL588圣诞产品认证，软线UL62认证代理，PCBA线路板组装ZPVI2认证，电容UL认证，开关UL认证，网络线UL444认证，锂电池、镍锰电池UL认证，水晶头UL1863认证，导电泡棉UL认证，光伏电缆UL认证，UL817插头认证，ECBT2 UL1997连接器认证，热缩套管UL认证，功率线UL13认证，UL507直流交流风扇认证，UL最新RSCS环保认证，阻燃套管UL认证，火灾报警线UL1424认证，UL2089车载充电器认证，UL1059端子台认证，塑胶电镀处理UL认证，光纤UL1651认证，UL355卷线器认证，UL486接线端子认证，UL486接线端子认证 塑胶料QMFZ2认证，UL764线束认证，UL310快接端子认证，UL1446绝缘系统认证，开关VDE认证，各国电线电缆认证，各国插头认证
详询Sunny陶13913142465 QQ1822971259
Performance may be investigated with respect to electrical track resistance, ability to resist ignition from electrical sources, and other electrical properties. In order to avoid an excessive level of implied precision and bias, material performances for several tests are recorded as Performance Level Categories (PLC), based on the mean test results (rather than recording the exact numerical results), as indicated in the table following the test description.
Hot-wire Ignition (HWI; ASTM D3874, IEC 60695-2-20) — Performance is expressed as the mean number of seconds needed to ignite standard specimens (if the material ignited). An HWI PLC 0 may be due to all the test specimens melting away without any ignition.
HWI Range
Mean Ignition Time (in sec) Assigned
PLC
120 and longer 0
60 through 119 1
30 through 59 2
15 through 29 3
7 through 14 4
Less than 7 5
High-current-arc Ignition (HAI; ANSI/UL 746A) — Performance is expressed as the number of arc-rupture exposures (standardized as to electrode type and shape and electric circuit) that are necessary to ignite a material when they are applied at a standard rate on the surface of the material.
HAI Range
Mean Number of Arcs
to Cause Ignition Assigned
PLC
120 and greater 0
60 through 119 1
30 through 59 2
15 through 29 3
Less than 15 4
High-voltage-arc Tracking Rate (HVTR; ANSI/UL 746A) — Denoted as the rate, in mm/min, that a tracking path can be produced on the surface of the material under standardized test conditions. A notation is made if ignition on the material takes place. The results of testing the nominal 3 mm thickness are considered representative of the material's performance in any thickness.
HVTR Range
(in mm/min) Assigned
PLC
0 through 10 0
10.1 through 25.4 1
25.5 through 80 2
80.1 through 150 3
Greater than 150 4
High-voltage, Low-current-arc Resistance (D495; ASTM D495) — Expressed as the number of seconds that a material resists the formation of a surface-conducting path when subjected to an intermittently occurring arc of high-voltage, low-current characteristics. The results of testing the nominal 3 mm thickness are considered representative of the material's performance in any thickness.
D495 Range
Mean Time of Arc Resistance
(in sec) Assigned
PLC
420 and longer 0
360 through 419 1
300 through 359 2
240 through 299 3
180 through 239 4
120 through 179 5
60 through 119 6
Less than 60 7
Comparative Tracking Index (CTI; ASTM D3638) — Expressed as that voltage which causes tracking after 50 drops of 0.1% ammonium chloride solution have fallen on the material. The results of testing the nominal 3 mm thickness are considered representative of the material's performance in any thickness.
CTI Range
Tracking Index
(in volts)
Assigned
PLC
600 and greater 0
400 through 599 1
250 through 399 2
175 through 249 3
100 through 174 4
Less than 100 5
The above characteristics and dielectric strength, volume resistivity and other electrical and mechanical properties may be determined by means of the applicable ASTM and/or UL specification in ANSI/UL 746A, "Polymeric Materials - Short Term Property Evaluations."
In addition to minimum electrical and ignition test levels, materials that are used in applications involving support or contact with current-carrying parts are also required to display a minimum stability (heat distortion, moisture resistance, dimensional stability and mold stress) performance level, as described in ANSI/UL 746C.
代理范围:
(一)水平燃烧测试,94HB,并指导前期打样送测;
(二)垂直燃烧测试,94V-2,94V-1,94V-0,并指导前期打样送测;
电子线UL758认证，灯具UL认证，电线电缆UL认证，QMMY2 UL746D注塑件认证，UL969 PGDQ2标签认证，连接器UL认证，灯饰CCC认证，线路板组装VZQC2认证，UL969 PGAA标签认证，UL588圣诞产品认证，软线UL62认证代理，PCBA线路板组装ZPVI2认证，电容UL认证，开关UL认证，网络线UL444认证，锂电池、镍锰电池UL认证，水晶头UL1863认证，导电泡棉UL认证，光伏电缆UL认证，UL817插头认证，ECBT2 UL1997连接器认证，热缩套管UL认证，功率线UL13认证，UL507直流交流风扇认证，UL最新RSCS环保认证，阻燃套管UL认证，火灾报警线UL1424认证，UL2089车载充电器认证，UL1059端子台认证，塑胶电镀处理UL认证，光纤UL1651认证，UL355卷线器认证，UL486接线端子认证，UL486接线端子认证 塑胶料QMFZ2认证，UL764线束认证，UL310快接端子认证，UL1446绝缘系统认证，开关VDE认证，各国电线电缆认证，各国插头认证
详询Sunny陶13913142465 QQ1822971259
