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FREQUENTLY ASKED QUESTIONS

What are the benefits of using UL CAP?
Benefits of the UL CAP include:
  • Faster test results
  • Prompt notification for test failures
  • Witness actual testing
Exactly how fast can we get our test results?
For example, the time required for a complete testing of a PWB could have a dramatic difference between UL CAP and non-CAP. In this illustration, we have included the Bond Strength Testing in calculating the required time, which takes either 10 or 56 days. If we assume that a 56-day conditioning is elected, the difference in time-to-completion looks like this:


As you can see, there is quite a dramatic difference in the time-to-completion. This is why we encourage our customers to take advantage of the CAP where possible.
I already filed my application with UL, but have yet to receive the sample requirements. Is it supposed to take this long?
The reason for this delay is attributable to few things. First, a single UL engineer could be dealing with as many as over 100 clients at once, and each application is handled on a first-come first-serve basis. So, depending on the volume of applicants when you submit your files, the response time can be very long.

Second, it is not very easy to communicate a description for a new product or material. Misunderstanding of the product description leads to multiple exchanges of emails and this results in a significant delay of the overall process. The key to obtaining the sample requirements faster is to keep the description of the new product concise and precise. Keeping this in mind when you submit your files can expedite the process by eliminating unnecessary email exchanges and save you time and effort.
Can we witness the tests whenever we want?
Yes. Just let us know in advance and we will arrange it.
If we test under CAP, does that mean that we don't have to do any testing at UL?
No. To verify the correlation between our test results and UL, UL will also perform a correlation test. However, the results of the correlation tests are strictly between us and UL, and will have no effect on our client's certification. For certain materials such as plastics and solder resists, UL requires an ID (IR, TG or DSC). Please note that these tests are conducted at UL for use in the follow-ups.
Even though our product has passed the CAP testing, could the certification be withdrawn if it fails the correlation test?
No. The correlation testing is strictly between us and UL, and has no effect on our client's certification.
Are CAP test results accepted by every UL office?
Yes, CAP results are accepted regardless of the office location you wish to apply with. However, please be sure to discuss this with our application processing staff about this, since there could be some differences in the timing of the correlation tests.
It's really cumbersome that we have to make additional samples when using CAP...
We understand that it could be very difficult to prepare test samples between your everyday business, but please understand that UL must confirm that tests delegated to outside agencies using CAP are conducted accurately and correctly, and the correlation tests are crucial in establishing this. While our intentions are not to burden our customers, please understand that these extra samples for the correlation test are necessary for ensuring product safety.
Is it cheaper to test under CAP or at UL?
To tell you the truth, it would be less expensive to have the tests done at UL. Whether you elect to use the CAP or not, there is only a small difference in the UL fees, while using CAP would require additional fees for the testing. However, with companies pushing product development and the subsequent production to complete in a very short time frame (in some cases as short as 3 months or even shorter), and the rapidly changing business landscape, how fast you can pass necessary tests and establish compliance with safety standards has become a critical issue. As such, we strongly believe that "time is money".
Can you conduct follow-up tests under CAP?
Unfortunately, follow-up tests are conducted at UL only.
Is it possible to estimate or predict sample requirements?
While we cannot provide any guarantee as to what sample requirements will be issued as we do not know what UL will require in the correlation test, we can provide a reasonable estimate based on the content of the application.
Can we use CAP testing even for Build-up Printed Wiring Boards?
Yes, tests for build-up printed wiring boards can be done using CAP.