Everyone should know basic electricity stuff..... its common sense....

[KnyghtRyder]

Most straightforward to try. I googled.

Problems with the bearings

As time passes by, your fan might start slowing down because of the dust and dirt formed inside it. It may be hard to understand at first, but with time dirt and oil gets formed in the bearings of your fan what makes it harder for it to spin the blades. That is why you should try to clean it regularly and oil its motor and bearings as necessary in order to prevent such a thing happen.

However, if your ceiling fan has already started to slow down, you can fix it just by cleaning its bearing. The process is simple and quick. Remove the blades of the ceiling fan, if they are removable. If not, just open the fan, and clean the bearing with a wet tissue then let it dry. If the dust has formed layers, try harder to remove it with a pointy tool. Do it slowly and carefully. Make sure the ceiling fan is off when you do it and then add oil.

how old is this fan? most of those sold in last 10 years no longer use greased bearings any more and they don't suck up dust and grime like the really old ones. Nowadays all use graphite-based lubrication.

 

[KnyghtRyder]

No choice, inflation. You also have to take into consideration that they are also earning money. Not just want to chop you carrot. transport itself is a cost. bigger companies are cheaper cause they have a bulk of customers waiting for them. its like if you dont engage me, its fine. you're not the only customer.

in time to come I expect most of these types of installation and repair services to charge minimum $500 for labour and transport.

 

[drkcynic]

how old is this fan? most of those sold in last 10 years no longer use greased bearings any more and they don't suck up dust and grime like the really old ones. Nowadays all use graphite-based lubrication.

2 years. Look, I am not going to disagree with you on what's the problem. The thing is, it's all trial and error for the laymen, like me.

So i try to read up, but like i said, not everything can be found online. Sometimes even if you think you found the solution, something goes wrong along the way while you are fixing and you have no idea to salvage, the situation gets more desperate.

So eventually you will have to pay a pro to fix your problems.

 

[aspenco]

15kw go with 32A. That’s good to up to a bit over 20kw. I did the math when I specified the connection point for a future 22kw EV charger.

The common 3ph isolator sizes are 16/20/32/63 afaik.

You probably need to so more math to determine the MCB breaker size and response and tailor it closer to equipment requirements. Check out the machine faceplate. Usually power requirments are engraved on it. Or the specifications part of the manual.

Long story short overspec the cable and connection hardware so it runs cool. As long as it doesn’t damage your wallet too much. Copper is expensive.

DO NOT overspec the overcurrent protection circuitry. It is there to protect your equipment.

thank you! yes, you are very right. am helping my in laws as they are planning to buy an ev and would like to set up a charging point in their home. someone (c0ntractor) told us need to have 3 phase, minimally 15kw for fast charging setup. very expensive cos they need to also run extension to the garage area where they will place the isolator and stand alone charger or something. a lot of things man, and very expensive...

 

[KnyghtRyder]

2 years. Look, I am not going to disagree with you on what's the problem. The thing is, it's all trial and error for the laymen, like me.

So i try to read up, but like i said, not everything can be found online. Sometimes even if you think you found the solution, something goes wrong along the way while you are fixing and you have no idea to salvage, the situation gets more desperate.

So eventually you will have to pay a pro to fix your problems.

good luck with the repair. Thanks for sharing.

 

[aspenco]

depends whether balanced of unbalanced load.

those charging port for ev is considered which one ah? balanced ah?

 

[KnyghtRyder]

thank you! yes, you are very right. am helping my in laws as they are planning to buy an ev and would like to set up a charging point in their home. someone (c0ntractor) told us need to have 3 phase, minimally 15kw for fast charging setup. very expensive cos they need to also run extension to the garage area where they will place the isolator and stand alone charger or something. a lot of things man, and very expensive...

you could save some money by not using a quick charger if you planning on charging overnight. Then all you need is a standard household outlet.

For example, if you have the ability to come home and plug in your car every day and all you do is commute to work and back and run some weekend errands, that a light enough usage that a non-quick charge should be more than sufficient.

 

[KnyghtRyder]

those charging port for ev is considered which one ah? balanced ah?

balanced.

 

[aspenco]

balanced.

ty

 

[aspenco]

you could save some money by not using a quick charger if you planning on charging overnight. Then all you need is a standard household outlet.

yes that was the option. but they planning to change 2 of their cars to ev...

 

[drkcynic]

yes that was the option. but they planning to change 2 of their cars to ev...

This one abit no point leh. Sometimes need to evaluate the situation.

You go DIY, it damages your cars, you incur more...

 

[whysoserioushuh]

2 years. Look, I am not going to disagree with you on what's the problem. The thing is, it's all trial and error for the laymen, like me.

So i try to read up, but like i said, not everything can be found online. Sometimes even if you think you found the solution, something goes wrong along the way while you are fixing and you have no idea to salvage, the situation gets more desperate.

So eventually you will have to pay a pro to fix your problems.

probably let us know whats your model. someone here could be facing the same problem as you and might have solved it. my ceiling fan remote got 3 speed, but actual fan got 2 speed. its low or high only.

 

[KnyghtRyder]

yes that was the option. but they planning to change 2 of their cars to ev...

which car is this? Tesla? nissan leaf? toyota phev?

Some car models can schedule their charging. You can set them to charge at different times.
Most EVs in singapore can be fully charged in 8 hrs even with a normal household socket. With a range of over 300km. Why not charge each EV half a night or alternate charging days?

 

[DragonFire]

thank you! yes, you are very right. am helping my in laws as they are planning to buy an ev and would like to set up a charging point in their home. someone (c0ntractor) told us need to have 3 phase, minimally 15kw for fast charging setup. very expensive cos they need to also run extension to the garage area where they will place the isolator and stand alone charger or something. a lot of things man, and very expensive...

The connection hardware will indeed get a bit expensive. When you move from 1.5mm2 to 6mm2 the price increase is quite drastic. 22Kw is where you want to be, Porsche and Tesla home chargers max out at this level.
Beyond that are superchargers which require you to have your own medium tension substation, which is an unlikely proposition unless you own a GCB.

 

[keenklee]

IMHO.
It is not a matter of know or don't know.
Self taught is dangerous. There is a difference between theory and practical. Experience is important.
That is why there is licensing.
I have a tendency to leave it to the people who are licensed to do so.
Supply and demand - DIY will make the standard of living more expensive.

P.S.
For voltage, please do not think that small numbers are safe e.g. 18V.
Some 18V battery can generate about 1400W of power.
PMDs battery also similar technology.

 

[DragonFire]

which car is this? Tesla? nissan leaf? toyota phev?

Some car models can schedule their charging. You can set them to charge at different times.
Most EVs in singapore can be fully charged in 8 hrs even with a normal household socket. With a range of over 300km. Why not charge each EV half a night or alternate charging days?

If you combine EV with a high power solar array, you might want to get all your charging done whilst the array is putting out peak power. That's a specific 4 hour window.

The other use case is if you ware on wholesale power, and want to smart charge when power tariffs are at their lowest.

I foresee in the long run that EVs will start playing the role of mobile household battery packs. You have a perfectly good 50kw battery in the driveway that could store energy from your PV array and release it back for your consumption at night. It does not take a lot of engineering to get this done - as long as the EV companies are complicit.

 

[drkcynic]

IMHO.
It is not a matter of know or don't know.
Self taught is dangerous. There is a difference between theory and practical. Experience is important.
That is why there is licensing.
I have a tendency to leave it to the people who are licensed to do so.
Supply and demand - DIY will make the standard of living more expensive.

P.S.
For voltage, please do not think that small numbers are safe e.g. 18V.
Some 18V battery can generate about 1400W of power.
PMDs battery also similar technology.

Agree. I will usually leave the job to the professionals. I will try to read up, i will only do it if I am 90% confident and the costs of "screwing" it up is imo, manageable. Eg, no point saving $200 and end up damaging $2000 worth of items due to a failed DIY.

If i find a good yt step by step or a good writeup which is 90% similar to my issue then I will try. Otherwise suck thumb and pay up.

 

[aspenco]

This one abit no point leh. Sometimes need to evaluate the situation.

You go DIY, it damages your cars, you incur more...

i was told they have portable charging unit using those normal 240v 3 pin. but those are very very slow.

 

[aspenco]

which car is this? Tesla? nissan leaf? toyota phev?

Some car models can schedule their charging. You can set them to charge at different times.
Most EVs in singapore can be fully charged in 8 hrs even with a normal household socket. With a range of over 300km. Why not charge each EV half a night or alternate charging days?

yes Tesla. never owned one before, but my buddies who drive them in the us did share that they have many fast chargers all over cali. so dont really need to invest in an expensive charge at home.

 

[aspenco]

The connection hardware will indeed get a bit expensive. When you move from 1.5mm2 to 6mm2 the price increase is quite drastic. 22Kw is where you want to be, Porsche and Tesla home chargers max out at this level.
Beyond that are superchargers which require you to have your own medium tension substation, which is an unlikely proposition unless you own a GCB.

yes. not sure how true but we were told that it will easily cost at least 10k just to have additional access to 3 phase or something.