有问必答

本人从事UL有10多年的经验,对工厂检验,UL申请和部分标准相对比较熟悉.在此希望各位同仁发表各自的问题,大家共同讨论,为日后取得UL认证获得经验知识和建议.谢谢大家的参与.

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liaohuachang

LV.5

2006-06-30 21:05

就需要你这样的人才,那我就先问了.
要确定一盏灯是属于UL的哪个标准,主要是跟灯具中的哪些因素有关呢?请详细解答一下,先谢过!

vincent_yao

LV.2

2006-07-03 10:53

找到救星啦!
这位大侠,请问一下:

UL无极性双扁直插在美国本土有使用吗?什么时候使用?为什么有大细脚那么好的插头还要这个?

期待您的答复!谢谢!

rickycui

LV.2

2006-07-03 17:09

@liaohuachang

就需要你这样的人才,那我就先问了.要确定一盏灯是属于UL的哪个标准,主要是跟灯具中的哪些因素有关呢?请详细解答一下,先谢过!

一般根据其使用条件判断属于哪个UL标准.例如:移动灯具一般属于UL153或UL962,固定灯具一般属于UL1598.例外是圣诞产品UL588,低压灯UL2108,轨道灯:UL1574和水管灯UL2388.

rickycui

LV.2

2006-07-03 17:16

@vincent_yao

找到救星啦!这位大侠,请问一下:UL无极性双扁直插在美国本土有使用吗?什么时候使用?为什么有大细脚那么好的插头还要这个?期待您的答复!谢谢!

无极性的在美国本土还在使用.是使用极性还是非极性有最终电器产品所在的标准决定.分大小脚是为了防止极性插片插入插座的非极性插孔里面.

kim40

LV.3

2006-07-03 17:42

I find some competitor UL products violate the standard, but they got the approval from Taiwan UL.
Any UL lab that have engineer more easily to sign the UL certificate?

rickycui

LV.2

2006-07-04 10:03

@kim40

IfindsomecompetitorULproductsviolatethestandard,buttheygottheapprovalfromTaiwanUL.AnyULlabthathaveengineermoreeasilytosigntheULcertificate?

I am not sure if you are discussing UL962 Standard,which is effective only in recent years.If you have any evidence about violating the standard,you can provide it to UL China for appeal.I also can assist you.

kim40

LV.3

2006-07-04 22:18

@rickycui

IamnotsureifyouarediscussingUL962Standard,whichiseffectiveonlyinrecentyears.Ifyouhaveanyevidenceaboutviolatingthestandard,youcanprovideittoULChinaforappeal.Ialsocanassistyou.

Standard is: UL 1310
Product is: linear transformer/adaptors
Our competitor applied UL certificate through Taiwan UL, its test report is much simple than Hong Kong UL, and shows no construction. Its end product exceeded the standard allowed temperature rise.

My questions are:
1. Is it good to apply through China UL?
2. What action China UL would take, if we provide samples which violated the standard?

西西

LV.1

2006-07-05 12:14

请问产品在一年内都不将生产,是否可以申请取消UL的厂检? 谢谢!

dyuan

LV.2

2006-07-05 15:44

请问电源要过UL认证需要重点注意那些方面?

renshan_lu

LV.4

2006-07-06 22:23

@西西

请问产品在一年内都不将生产,是否可以申请取消UL的厂检?谢谢!

1年内不生产是否代表以后不生产,如果永远停产则可申请取消.如果只是暂时停产,不需要取消,取消了再生产,要重新申请认证,很麻烦.

hwfyhi

LV.3

2006-07-10 15:58

请问.我现在的工厂不生产了.现在变成了公司.原来有申请UL产品.现在UL要进行厂检.请问.公司要准备什么样的资料.和工厂的检查有什么不同

rickycui

LV.2

2006-07-10 16:24

@西西

请问产品在一年内都不将生产,是否可以申请取消UL的厂检?谢谢!

建议申请ON CALL这种检验方式:即不用取消,又节省费用.具体操作,请与负责贵公司厂检的UL检验员联系办理.

rickycui

LV.2

2006-07-10 16:35

@dyuan

请问电源要过UL认证需要重点注意那些方面?

PWB上的电器间隙和变压器的电器间隙和结构.

rickycui

LV.2

2006-07-10 16:38

@hwfyhi

请问.我现在的工厂不生产了.现在变成了公司.原来有申请UL产品.现在UL要进行厂检.请问.公司要准备什么样的资料.和工厂的检查有什么不同

一一个UL文件下至少要有一家合格的生产厂地.你说原来的工厂变成了公司,那我请问:生产设备还在吗? 工商执照变更了吗? 如果UL检验员例行公事时发现生产场地不存在了,会建议UL取消的.

rickycui

LV.2

2006-07-10 16:39

@kim40

Standardis:UL1310Productis:lineartransformer/adaptorsOurcompetitorappliedULcertificatethroughTaiwanUL,itstestreportismuchsimplethanHongKongUL,andshowsnoconstruction.Itsendproductexceededthestandardallowedtemperaturerise.Myquestionsare:1.IsitgoodtoapplythroughChinaUL?2.WhatactionChinaULwouldtake,ifweprovidesampleswhichviolatedthestandard?

submit your evidence to UL NBK office.

ul60065/60950

LV.2

2006-07-10 18:04

@kim40

Standardis:UL1310Productis:lineartransformer/adaptorsOurcompetitorappliedULcertificatethroughTaiwanUL,itstestreportismuchsimplethanHongKongUL,andshowsnoconstruction.Itsendproductexceededthestandardallowedtemperaturerise.Myquestionsare:1.IsitgoodtoapplythroughChinaUL?2.WhatactionChinaULwouldtake,ifweprovidesampleswhichviolatedthestandard?

sure,different engineer have different understanding on standard.

More experience engineer have more flexiable report, it happen in every certification body

rickycui

LV.2

2006-07-11 10:43

@ul60065/60950

sure,differentengineerhavedifferentunderstandingonstandard.Moreexperienceengineerhavemoreflexiablereport,ithappenineverycertificationbody

I can not agree with you.There is no construction discription and temperature exceeded allowed T rise.It failed T test. UL Listing Mark shall not be authorized to use.