No need. The meter only "rotate" on true power. The reactive power does not contribute to supply any energy to operate appliances. Appliances work only on real power.

So, basically the meter only measures the true power portion. If the PF drops, the power usage also drops. Meaning the appliances is not running at maximum efficiency, thus more waste power. However, since the meter does not capture the reactive portion, the waste power is not captured also. On the negative side, your appliances is running hot but not performing

Basically, domestic appliances are designed to work very efficient already. That is why now they have Star Ratings. So, for me, the so called device to save electricity is just a waste of money.

This is consider new modern appliances already. Are you sure the PF is just 0.6. It must be mistake somewhere. The 0.6 is very low

As you've probably known, appliances with motor such as compressor only need to be corrected. Now light are LED, so no need phase correction. Same as majority of appliances.

It is because of the meter reads more accurately perhaps. The meter is now transparent. Nothing hanky panky can be done too obvious

What is power factor?
The index is used to measure (from 0 to 1) the level of electricity consumption efficiently. A low index would mean that there is an inefficient use of electricity and it represents a waste of electricity, and vice versa.

Why penalise users with low power factor?
It is said that utility companies all around the world charge customers an additional surcharge when their power factor is low. TNB imposes a penalty because low power factor shortens the lifespan of electrical appliances and causes power system losses to TNB.

Who will be affected?
Customers from the commercial, industrial, mining and agriculture category that use three (3) phase low-voltage system should take note of this surcharge. TNB said that this surcharge does not involve customers in the domestic category.

How can one avoid from getting this surcharge?
TNB states that a Power factor surcharge is imposed when your power factor is less than 0.90 (electricity supply 132kV and above) or less than 0.85 (electricity supply below 132 kV).

How much is this surcharge?
Power factor surcharge for customers with electricity supply below 132 kV is calculated as follows:
1.5% surcharge of the current bill – for every 0.01 less than 0.85 power factor.
3% surcharge of the current bill – for every 0.01 less than 0.75 power factor.

http://<referral link removed>/my/lifestyle/save-your-mon...actor-surcharge

I think the PF is in the meter because the LCD is common for both. If the PF plays the factor in domestic customers' charge, it will show on the bill just like the commercial customers' bill.

Both type, ionizing and photoelectric sensors, have pro and con

This link is good brief explanation of both:

https://www.nfpa.org/Public-Education/By-to...s-photoelectric

The Xiaomi use photoelectric (read it somewhere). So, it is good for smoky type of fire. If fire produces more on toxic invisible gas like carbon monoxide, then it will not trigger. So, the best is to have both types. There are detector that detects invisible gas produced by fire if not mistaken but not vastly common.

Well, zigbee is low power device. It is like low power WiFi. Maybe your door is less penetrable

Your light switch has earth wire? Where that wire connected to? The screw?

What type of light is this? On ceiling? On wall?

You must be confused with yellow for earth. It is the color used for different phase in 3-phase house wiring system.

Your autogate has IR receiver?

opps I think I misunderstood the whole idea

This post has been edited by Zot: Mar 9 2018, 09:19 AM

I think the thinkings are going to complicated direction

I believe that any auto-gate for house has momentary switch on the wall to open and close the gate. Why can't just replace that switch with whichever remote switch?

The switch is just like grounding a button on the control board placed outside the house, I believe. It is more like signal level power, probably 6V. I never check

So, you will need something to power the remote switch

Then you know who is smarter than house owner

Just installed a remote light controller today. Damn hot on the ceiling, basically my sweat dripping. It is just using remote control and can control 3 power sources. Not sure how long the receiver unit on top of the ceiling.

Anyway, it is not consider smart home but just convenience home. So, no cat

Just normal traditional remote controller to switch light. Now instead of 1 light point, I now have 3 points. No need new wiring or wall switched. Just cheap old China made about RM36. Normal 433MHz frequency

http://smarthome.reviewed.com/features/eve...azon-echo-alexa

That is because xiaomi gateway limitation. Some people say 30 max but some people can connect up to 32. However, for zigbee mesh network, you can connect many more but the network will get sluggish. Some say 100 is about right for limit.

Any reason Broadlink do that?

Have you read this?
http://www.paulhibbert.co.uk/2017/11/24/a-...kbean-to-alexa/

This post has been edited by Zot: Mar 14 2018, 08:52 AM

I edit my previous post I dunno what's going on in Broadlink. Have not use any

Effective? What you meant by that?

Yes. 3-pin plug has nothing much for most Malaysians. You just use it to charge phone or temporary connection. For permanent one like hot water pot, fridge, microwave, washing machine, rice cooker; these are all left plugged and on.