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Electrical Wiring and Grounding?


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No!!     any ground will NOT trip the breaker the current will

 

May calculation is valid for AC or DC

 

What do you know about electricity ? 

 

I have not been able to find a RCD in cebu

 

https://en.wikipedia.org/wiki/Residual-current_device

 

Did you notice I said VECO area ?

Yes i did. Was just pointing out how it is in my area. Not a problem i hope?

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Just a warning if you are in a VECO supply area or any other area that are supplied with 2 hots   They use single pole light switches, so even when you turn the light switch off you still have 1

Most use the RCD or RCCB term these days as the "ground fault" is often read as to require a ground to operate which is not the case.  In the USA these are normally only used in wet point areas (pool/

My breaker box

Posted Images

Woolf

Yes i did. Was just pointing out how it is in my area. Not a problem i hope?

 

you are right

if you are in an area that have 1 hot and 1 neutral  it is different

 

I will put the schematics  I made for different wiring of pole transformer here

it is in one the links I provided earlier

 

post-6705-0-62722300-1389451409.jpg

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Woolf

Just a warning if you are in a VECO supply area or any other

area that are supplied with 2 hots

 

They use single pole light switches,

so even when you turn the light switch off

you still have 1 hot at the lamp socket

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Ziggy Stardust

"Hunt downtown I've bought "twin and earth" cable there."

 

 

Do you mean the Colon area?  Do you know any landmarks near where you bought the cable? 

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If not downtown, Cebu Home Builders as i bought some 2.4mm 3 core last week.

They have a nice display board with 2" sections of all their available cables so you can see contents and sizes in the cross section at a glance..

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RogerDat

I have not been able to find a RCD in cebu

 

 

If you ask for a RCD, tHey have no idea what you are talking about. They are available on Mactan at hardware store in main market area. print the picture and take it with you. Cebu Home Builders on Mactan has the 30 amp, main market has 63 amp.

 

 

 

post-7667-0-17336100-1434335581_thumb.jpg

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Paul

If you ask for a RCD, tHey have no idea what you are talking about. They are available on Mactan at hardware store in main market area. print the picture and take it with you. Cebu Home Builders on Mactan has the 30 amp, main market has 63 amp.

 

 

 

attachicon.gifimages23.jpg

 

Here's a larger image if necessary:

Residual_current_device_2pole.jpg

 

So, this is the SE Asian version of a GFCI?

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lopburi3

Most use the RCD or RCCB term these days as the "ground fault" is often read as to require a ground to operate which is not the case.  In the USA these are normally only used in wet point areas (pool/bath) and are part of outlet.  Here in Asia they have become common for whole house protection (due partly most homes not having grounds so any leakage to that refrigerator handle goes to person/ground (rather than a dedicated ground line to trip home breaker before being touched by person).  Very good to have as it can save a life.

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Woolf

RCD, RCCB  or what ever they are called are mandatory in denmark

and I think in most of europe

 

In denmark it must be the 30 mA type

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Paul

 

 

In denmark it must be the 30 mA type

 

So, if it detects 30 milliamperes, or more, difference between the two legs, the breaker will fault?

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Woolf

So, if it detects 30 milliamperes, or more, difference between the two legs, the breaker will fault?

 

You got it

if more than 0.03 amp difference it will trip

Edited by Woolf
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Paul

You got it

if more than 0.03 amp difference it will trip

 

I wonder why the US didn't opt to go this route, rather than having individual GFCI receptacles in the bathroom, kitchen, garage, etc.? Seems it would be a much smarter idea to have one for the entire home, rather than one at every location. 

I guess it was due to the difference in the grounding system?

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Woolf

My breaker box

post-6705-0-45587100-1434341539_thumb.jpg

post-6705-0-15685800-1434341584_thumb.jpg

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lopburi3

The max 30mA (or lower) for personal safety but there is another type for fire safety used by many factories and that will have a higher 100mA so you have to be alert for that.

 

Here in Thailand the largest firm (Safe-t-cut) normally has adjustable sensitivity from 5-30mA - use the lowest you can without nuisance tripping (many older items such as compressors will have slight leakage and that can add up to more than the tripping total).

 

The US has always been behind (as there is a lot of electric there) and any change involves so much money/trouble.  US could use the same type as used here but so many items in the USA are made to minimal spec to sell at lowest price that slight leakage becomes an even more serious issue for nuisance tripping - and most would not be keen on trouble shooting the reason at the cost of electricians there.  

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RogerDat

 It must be the red / orange button type in Cebu / Mactan.

In otherwords a NL1-25, 30,65 as thats what the book says. Thats what they have here.

Alfonsos Hardware, matket area , accross from Rose Pharmacy

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