Sizing of DB for Outdoor Lighting

Whatsa DB?

It's a loud version of a henway.

Do you have a constant for that?

Okay, so whatsa henway?

^{Can't say I ain't a good sport!}

The standard unit of inductance.

Is not the coulomb of a henway smaller than the coulomb of a roosterway?

You'll have to ask Capt Moosie--he's the structural engineer.

I was thinking it was a

It is a place where a chicken can safely cross the road.

They are now taking contributions for a O'Possumway.

I wonder if the Possums in Australia have the same problem crossing the highway as our Irish O'Possum?

It's a Dead Body. _{(OK, I guess I watch too many cop shows)}

Deutsche Bahn?

Look in a code book. Don't have one? Get one.

If current draw were the only consideration, you could run all of this from one 15A CB of ground-fault type, using 14AWG wire throughout.

However, your local regulations may require dedicated circuits for various of these functions. Even if not required, that would be desirable, anyway, for convenience and serviceability.

Are the mercury lights actually 40W, or 400W?

What is the longest wire run?

Is there more detail on the 1-phase AC loads?

1000W/230V = 4.4 Amps

1000W/110V = 9.1 Amps

What is the mains voltage where you are?

By comparison, a normal kettle (here in the UK) is 3000W; a typical fan heater is 2000W

DB, in countries outside of North America, is a "Distribution Board", what we call a "Panel Board" or "Load Center".

Geez...I worry that questions like this are asked by people who appear to have the responsibility of carrying out the work. Good thinking posting anonymously.

Really - a third year apprentice could reasonably be expected to figure the answers to this out in less than 5 minutes.

Many jurisdictions use the acronym DB for distribution board as separate from MDB for main distribution board.

OK it sounds like a border crossing checkpoint type of setup....

If you have to ask these questions,why are you performing this work?

Is this a homework question,for surely you are a beginning student?

If you are a licensed electrical contractor,and don't know how to do these basic

calculations, you should not be licensed.

30Amps... #10 wire... A/C dedicated circuit 20Amps up to 12,000 btu's....

http://engineering.electrical-equipment.org/electrical-distribution/residual-current-circuit-breaker-rccb.html

Too bad about the ambiguity between AC (which usually stands for alternating current) and A/C (air conditioning). That changes the whole picture, because it becomes the dominant load.

What does this have to do with a decibel?

That would be "dB", not "DB"...

...Unless, well, you know what we say about anonymous posters.

Yes, but when one doesn't define a jargon, abbreviation then any meaning of the abbreviation is just as valid.

Yep, y'all scared him off, so now he will do whatever he thinks and create a hazardous situation.

Or... He found good information somewhere else (yeah, right).

Or... He is just another one of those APs who, even though every effort has been made to elicit feedback from him, he ignores it because it is too much trouble.

This is a prime example of the most frustrating thing about this forum: not enough initial information and/or subsequent feedback from the OP.

A lot of these are students looking for answers to test questions, and they have no basis in reality...the vagueness of the question suggests that the op has no understanding of the terms used in actual practice of electric service installation....This type of question from the internet just comes with the territory of having an open forum....

British Standard 7671.

Doesn't cover design.

The best you will get from it is "correctly designed" but it doesn't tell you how to design.

Same with the NEC.

It is informative,not instructive.

So many factors shall be considered.

Lightiing DB gets 3 phase from SWGR and MCC and distributes it into single phase because fixtures are suitable for singl phase in general practice.

You need to calculate total summation of all power consumption. And to select incomer CB of DB.

For cable, you need to check the requirement. If no mention on it, you just consider the current carrying of the cable and voltage allowance of fixtures.

Hope it help you.