This is what I’m talking about. I’m not familiar with Netherlands legal system but in most of EU is the same. This one person is probably the owner and the ceo, It is the same thing here in Croatia.
We all share the common company law that is mostly made in Germany with some variations in every state.
I believe that this company is totally legit. Why woudn’t it be? It has a VAT number, paying taxes.
fff - fell for fraud?
Buying online indeeed isn’t easy! The buyer can do many things wrong like buying from fake stores or companies from overseas when not doing the mandatory due diligence.
As a rule of thumb, if the stuff costs 2/3 or less than from a well known local company than something is fishy.
If you want to be sure don’t buy online at all but support your local dealer @JoFranke - it’s also easier to sue them in case you want to try your luck to enforce liability claims!
Simple. Don’t overload the circuit. The relays in these devices are rated at ten or fifteen Amps. But NOT at 100% duty cycle. If you are pulling more than 50% of the rated power, I would research a contactor instead of a light-duty relay.
The answer I got from the sonoff nl(which actually is tv home something) was,
If you install the devices accordingly and don’t overload, you don’t have to worry about fire hazard.
So I should simply not overload,
the strange thing is, Last week a 16A circuit breaker kicked in because of a faulty LED which was switched by a 2A supported sonoff device.
the sonoff switch went without any demage even it should also had to handle 16A,
but only for a short time.
I haven’t seen any Sonoff device with a fuse integrated into it, so a short or overcurrent will trip the first protection device it finds. In your example, a 16A (don’t you mean 15A?) breaker. It would not matter if the Sonoff were a 100 Amp contactor, there is no inherent protection.
Circuit breakers and fuses DO NOT protect the devices they are on.
A circuit breaker or fuse isolates a fault condition as close as possible to the source and leaves the rest of the system up and running as usual. In other words, if you drop a screwdriver on your PCB and short out a few things, the fuse on the power supply will blow- isolating the fault (screwdriver shorting out the PCB) from the upstream circuits. The fuse does NOTHING to protect the PCB from the screwdriver.
Fuses and circuit breakers are protection devices and exist to protect components upstream of the protection device. Your master circuit breaker may be 100 or 200 Amp and below that a bunch of 15, 20 and even some 30 Amp breakers. If you have a 15 amp circuit that experiences a failure, the breaker or fuse on that circuit will remove the failing device from the upstream circuits to protect them. The failing device is already toast, so there’s no protecting it. All other circuits are protected because the failure path has been broken. Thus the name: “Circuit Breaker”.
no 16A, it’s common in NL
I know how circuit breakers work, but I was more wondered why my sonoff wasn’t fright,
I fright a shelly that way.
It’s actually a shame they don’t come with fuses to protect themselves. But I’ve seen tests and when they overload they melt, they don’t burn. Burning means there is something internally wrong and it’s not overloaded.
but this can also happen with a phone charger.
A fuse on the device would not protect the device. The fuse protects the upstream circuits and devices connected to them.
You’re almost right.
As you said the breaker/fuse does protect the upstream circuits from unnecessary tripping by a fault downstream. it’s a term called “selective tripping”. It trips a smaller rated breaker closer to the load (which has less devices attached to it - say a few outlets) than a bigger rated breaker further from the load (which has more device attached to it - as in the rest of your house).
But it also does indeed protect the equipment downstream of it as well. It protects the equipment that caused the fault from burning up by either a short duration intense fault such as a short circuit or a longer duration small fault such as a circuit pulling 20 amps on a 15 amp rated circuit. without that smaller breaker tripping and clearing the small fault on a lower rating circuit you risk a fire in that circuit since the typical larger breaker upstream is possibly hundreds of amps.
No. It does not. The breaker or fuse removes the faulting device from the upstream circuits. The fuse may protect the desktop the device is sitting on, but if the device has faulted enough to trip the breaker or blow the fuse, the faulting device is in all probability toast.
a fuse does not protect the faulty device, which is broken anyway,
but a fuse can indeed protect other devices or the device itself.
If sonoff would add a fuse between the light(or device) and the switch, and the device will blow, the fuse reacts and there can’t be an internal overload.
Which makes me wonder now why most certificates do not require fuses for electrical equipment. either replaceable or bi-metal.
Normal(EU) dimmers mostly have a glass or sand fuse to protect the dimmer itself from overloading.
yes. it does.
Have you never had a breaker in your house trip just because there were too many loads plugged in to different outlets on the circuit? I have. And all I had to do to fix it was to unplug the too many loads and reset the breaker.
the downstream devices weren’t anywhere near being toast.
if the breaker hadn’t tripped then the wires going from the breaker to those two/more outlets would have been overloaded and may have potentially overheated and cause them to start a fire.
in that case the breaker was definitely there to protect the downstream circuit. Specifically in that case the wires from the breaker to the load.
Also, don’t you think it’s just a coincidence that the both the wires from the breaker to the load and the outlets connected to them have a rating that is pretty much exactly the same as the rating of the circuit breaker. It’s because the breaker is designed to protect the wires and outlets downstream from overheating. Again, that’s not just a coincidence.
When I’m not spending my time on the forums as an unpaid tech support guy for HA 
I moonlight as an industrial electrician. So another example is that we have a bunch of individual motors that make up a conveyor system. Each motor has it’s own breaker. Sometimes a piece of scrap gets caughht in the conveyor which causes the motor to work harder so it draws more current. the breaker is sized so as to be the same as the full load current of the motor to make sure the breaker trips if the motor is an overload state to protect the motor from overcurrent before it gets too hot and burns up the motor.
Circuit protection is 100% definitely also there to protect the downstream equipment as well as providing for selective tripping to protect the upstream system integrity.
No. It does not.
In your example the breaker did nothing to protect the devices. The breaker protected the wiring between the overload condition and the next protection device.
In your second example, the breaker is protecting the upstream circuits. The fact that a downstream motor is interrupted before damage can occur is strictly coincidental. But not guaranteed.
You are simply wrong about this (aside from the already agreed to portions of what you said above since I did say “mostly”). I could go deeper into the design considerations of electrical circuits but there’s no reason to do that here. I know what my 40 years of training and experience has taught me. The only reason I care what you are saying at all is that I don’t want to promulgate incorrect information. Otherwise you do you.
So we’ll just leave it here.
exactly.
The operative word here is can. The primary purpose of a circuit breaker or fuse is to remove a fault (an overload is a fault) from the circuit. If it happens to break the circuit before damage occurs to the device, fine. But that is not the primary purpose of the circuit interrupter. Most often in the case of a fault, like a failing power supply for example, the device is already toast by the time the circuit is interrupted.
Like you, I have 40+ years of experience, but not continuously. My father was an electrical contractor and I worked for his firm many a summer through high school and college. I apprenticed at IBEW716 in Houston. I dropped out of the journeyman path and went to college for a degree in Electrical Engineering. Then I tossed all that and went into computer programming. In hindsight, seeing what $$ an electrician gets for installing a 240V outlet makes me wonder if I took the wrong career path. I do, however refer to the NEC when working on a home project, and yes, I do pull permits and get inspections. (Much to the amazement of the city code enforcement).
then you should know that there is a lot more that goes into circuit design and selective tripping than just the simplistic “it only clears faults” cave-man approach.
Of course the primary purpose is to clear the fault. I never denied that. But just because some design aspect of a circuit is a secondary design aspect it doesn’t mean that it’s not also an intended purpose. it can be (and in fact is) designed to do both. And again it all is determined by the requirements of the system.
so to say that a circuit breaker’s or fuse’s sole and singular purpose is to solely and singularly only protect the upstream system is just wrong. Or at a minimum only partially correct (which inversely means partially wrong) and that I’ve already agreed to many times now.
The electrical protection system is designed to provide for a means to protect the system from damage to every portion of the entire system. the different breaker trip setpoints are designed to provide Selective tripping which provides for upstream protection by clearing a fault downstream to interrupt power to the minimum number of devices possible. the breaker also protects the downstream devices/equipment to minimize further damage to that circuit.
you are laser focused on one aspect of that design while ignoring the rest.
No. that is only one consideration and very far from being the most often cause of a tripped breaker. Most of the time plugged in appliances almost never burn up (except for Sonoffs apparently - you see how I brought this discussion back to the OP )
you really seem to be misunderstanding the difference between the electrical circuit holistic design requirements and the end devices that get plugged into that circuit.
Yes, there is a good chance that the appliance you plug in to the wall will be rated for a lower current than the 15 amp breaker that powers the circuit. But your hand mixer or curling iron aren’t even covered by the NEC at all. Those are covered by UL and/or other certification/regulating authorities. Tho they are/can be part of the design considerations of the distribution system.