UL testings

[mbrooke]

What are the typical UL tests (like reverse polarity) that small appliances and consumer good under go?

 

[SSDriver]

Test 1: Did the check clear


I'm curious to find out as well. I'd imagine its quite different dependent on the appliance.

 

[don_resqcapt19]

What are the typical UL tests (like reverse polarity) that small appliances and consumer good under go?

Go read the product standard. ( I gave you the information on how to access the UL standards a week or two ago) The standards specify all of the details of any testing that is required for the product to be listed.

Given that the standards have required the use of polarized attachment plugs for decades, there might not be any testing for that purpose in the product standards.

 

[mbrooke]

Go read the product standard. ( I gave you the information on how to access the UL standards a week or two ago) The standards specify all of the details of any testing that is required for the product to be listed.

Given that the standards have required the use of polarized attachment plugs for decades, there might not be any testing for that purpose in the product standards.

Right, but I just need numbers. Ie 489 applies to molded case breakers. But what applies to consumer goods?

I know for a fact UL does dielectric testing, reverse polarity, voltage bandwidth, ect for consumer goods.

 

[Jraef]

There may be more...

• UL 73 Electric Motor-Operated Appliances
• UL 197 Commercial Electric Cooking Appliances
• UL 471 Commercial Refrigerators and Freezers
• UL 499 Electric Heating Appliances
• UL 541 Refrigerated Vending Machines
• UL 749 – Household dishwashers
• UL 763 Motor-Operated Commercial Food Preparing Machines
• UL 859 Household Electric Personal Grooming Appliances
• UL 923 Microwave Cooking Appliances
• UL 1026 Electric Household Cooking and Food Serving Appliances
• UL 1082 – Standard for electric coffee makers and brewing-type appliances
• UL 1431 Personal Hygiene and Healthcare Appliances
• UL 1727 Commercial Electric Personal Grooming Appliances
• UL 1951 Electric Plumbing Accessories
• UL 7001- Sustainability standard for household refrigeration appliances
• UL 60335-1 Household and Similar Electrical Appliances

Check out this wording on UL 73:

1.4 These requirements do not cover equipment intended particularly for the control of electric motors; separator motors; nor electric clocks, fans, clothes dryers, washing machines, hair dryers, tools, waste disposers, dishwashers, office appliances and business equipment, refrigerators, air conditioners, vending and amusement machines, hair clippers and shavers, snow movers, automotive and garage equipment, or other motor-operated appliances that are covered by individual requirements.

What the heck is left?

 

[suemarkp]

When you read these you will see many common procedures such as the standard UL Finger used to make sure live parts can't be touched by a finger or a small diameter rigid poker (e.g. small screwdriver or paperclip). There is a common requirement that the chassis bonding resistance be 100 mOhms or less to the EGC.

UL 60950-1 covers IT type equipment (computers, monitors, switches/routers, etc).