You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
Ul certified equipment
- Thread starter kg
- Start date
- Status
- Not open for further replies.
bphgravity
Senior Member
- Location
- Florida
It depends, read the manufacturer's instructions and check the listing detail the equipment falls under.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
You can not ever violate a UL listing. A UL Listing says the equipment/device was MANUFACTURED to a specific set of standards. You can however modify an item to the point where the UL Listing is no longer valid for the application (i.e. removing the door of an outdoor device).
It is also possible to modify equipment so that it no longer follows the manufacturer's instruction
It is up to the AHJ to decide if a longer cord is a problem.
It is also possible to modify equipment so that it no longer follows the manufacturer's instruction
It is up to the AHJ to decide if a longer cord is a problem.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
This is the statement from the UL website:
"An authorized use of the UL Mark is the manufacturer's declaration that the product was originally manufactured in accordance with the applicable requirements when it was shipped from the factory. When a UL-Listed product is modified after it leaves the factory, UL has no way to determine if the product continues to comply with the safety requirements used to certify the product without investigating the modified product. UL can neither indicate that such modifications "void" the UL Mark, nor that the product continues to meet UL's safety requirements, unless the field modifications have been specifically investigated by UL. It is the responsibility of the Authority Having Jurisdiction (AHJ) to determine the acceptability of the modification or if the modifications are significant enough to require one of UL's Field Engineering Services staff members to evaluate the modified product."
"An authorized use of the UL Mark is the manufacturer's declaration that the product was originally manufactured in accordance with the applicable requirements when it was shipped from the factory. When a UL-Listed product is modified after it leaves the factory, UL has no way to determine if the product continues to comply with the safety requirements used to certify the product without investigating the modified product. UL can neither indicate that such modifications "void" the UL Mark, nor that the product continues to meet UL's safety requirements, unless the field modifications have been specifically investigated by UL. It is the responsibility of the Authority Having Jurisdiction (AHJ) to determine the acceptability of the modification or if the modifications are significant enough to require one of UL's Field Engineering Services staff members to evaluate the modified product."
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
Re: Ul certified equipment
The UL mark applies to the equipment as it existed at the time it was labeled. You can no more "void" it than you can label it in the first place.
It is possible for you to modify, install, or even just use the item in such a way as to create a hazard regardless of the label.
You need to look at it in a more rational way. If you need to make the cord a foot longer to avoid the use of an extension cord that would otherwise be required, changing out the existing cord for a longer one reduces the hazard you might otherwise have introduced (the extension cord).
Keep in mind a plug and cord connected piece of equipment is probably not an installation as such, and thus probably not subject to the NEC, although I am sure any number of people will argue about this.
kg said:Is it ok to change the length of a 120v SJ cord installed on a piece of equipment or does this void the UL rating?
The UL mark applies to the equipment as it existed at the time it was labeled. You can no more "void" it than you can label it in the first place.
It is possible for you to modify, install, or even just use the item in such a way as to create a hazard regardless of the label.
You need to look at it in a more rational way. If you need to make the cord a foot longer to avoid the use of an extension cord that would otherwise be required, changing out the existing cord for a longer one reduces the hazard you might otherwise have introduced (the extension cord).
Keep in mind a plug and cord connected piece of equipment is probably not an installation as such, and thus probably not subject to the NEC, although I am sure any number of people will argue about this.
- Status
- Not open for further replies.