Do I trust this breaker? - Page 1
Forum section: electronics / general

author: josh132
author_rank: Contributor
timestamp: March 20, 2021, 04:31:40 am
content: https://www.amazon.com/Miniature-Circuit-Breaker-Safety-DZ47-63/dp/B07Q7XDB9R/ref=sr_1_2?dchild=1&keywords=MCB+breaker&qid=1616214620&sr=8-2

author: Monkeh
author_rank: Super Contributor
timestamp: March 20, 2021, 04:33:02 am
content: No. Don't be cheap, the proper ones aren't even expensive.

author: lwatts666
author_rank: Unknown
timestamp: March 20, 2021, 04:42:16 am
content: Looks similar to the fake CB in this Big Clive Teardown:

author: coppercone2
author_rank: Super Contributor
timestamp: March 20, 2021, 05:53:56 am
content: just don't go with north korean, they never finish, I imagine ponyang has circuit breakers carved out of wood

author: coppercone2
author_rank: Super Contributor
timestamp: March 20, 2021, 06:26:50 am
content: theirs probobly has a square d logo branded into the wood

author: Alti
author_rank: Frequent Contributor
timestamp: March 20, 2021, 12:26:21 pm
content: Quote from: S. Petrukhin on February 08, 2021, 11:21:17 amNo worries, josh132 is bulletproof

author: drussell
author_rank: Super Contributor
timestamp: March 20, 2021, 12:54:59 pm
content: It is a bad sign when someone is selling what purports to be a "circuit breaker" as a DC unit when the silkscreen on the device clearly states 400V AC 50 Hz. It is unlikely to be suitable for DC at any voltage evenifit actuallyisan overcurrent device.At $5, there is a good chance that it is a mislabelled disconnect like BigClive showed rather than an actual circuit breaker with overcurrent protection. Who buys these things?!

author: Gyro
author_rank: Super Contributor
timestamp: March 20, 2021, 02:48:51 pm
content: There is a rule in the UK that only breakers from the same manufacturer as the consumer unit (panel) may be fitted. I don't know if it's the same in the US.P.S. Where has the OP's text gone? There's just the Amazon link now.

author: Monkeh
author_rank: Super Contributor
timestamp: March 20, 2021, 02:52:32 pm
content: Quote from: drussell on March 20, 2021, 12:54:59 pmI wish people would stop perpetuating the idea that thing is mislabeled. It is not, it is a plain and simple fake.Also, a genuine 3-pole MCB can be had for about $10 in single quantity..Quote from: Gyro on March 20, 2021, 02:48:51 pmThat's all there ever was.

author: Gyro
author_rank: Super Contributor
timestamp: March 20, 2021, 03:00:23 pm
content: Quote from: Monkeh on March 20, 2021, 02:52:32 pmAh, my brain must have seen the title as body text!In that case, the answer is even simpler... NO.

author: drussell
author_rank: Super Contributor
timestamp: March 20, 2021, 03:01:04 pm
content: Quote from: Monkeh on March 20, 2021, 02:52:32 pmWhy is that?Do you not believe that DIN-rail mounted non-fusible disconnect switches exist?Edit:Intentionallymislabelled as a scam, I mean...QuoteReally? Where?Personally, I don't think I would trustany$10 three-phase circuit breaker, but I would love to be proven wrong with examples of properly certified, robust equipment in that price range!

author: Monkeh
author_rank: Super Contributor
timestamp: March 20, 2021, 03:10:58 pm
content: Quote from: drussell on March 20, 2021, 03:01:04 pmUhm, there's at least three in my house. I know they exist. That's not one of them. I find it quite unlikely that the internal construction and 'contacts' would comply with IEC 60947-3 or any other applicable standard, certainly not to AC22A or AC23A.It's a fake, not a labelling accident.Quotehttps://www.tlc-direct.co.uk/Products/CPB1020C3.htmlThat's before any trade or quantity discounts, and they're probably not the cheapest around. MCBs areextremely cheapto make, thanks in great part to the economy of scale. Which is why the companies making them are so set on forcing slight safety improvements into the regulations at a 10-200x increase in price..

author: themadhippy
author_rank: Super Contributor
timestamp: March 20, 2021, 03:26:35 pm
content: QuoteNot quite what the regs actually say is536.4.203 Devices and components used in Consumer Units, Distribution Boards etc. must only be those that have been declared suitable for that purpose by the manufacturer of the assemble