BassThatHz Theater Build - Page 10

Try H1 traffic in Hawaii. That is bad. LOL

4/0 aluminum is rated at 205A. The panels are rated at 225A each. An 800A service would have parallel 500MCM Cu conductors.

You have 800A available across both ungrounded conductors (200 per leg x 4 legs), but it's referred to as a 400A service.

Still plenty of horsepower. Twice what my house has.

Even base traps will affect higher frequencies if the material is not acoustically transparent.

Sorry for OT, but what was the music you were using for your "Rear Speaker Test"-video? It sounded somewhat familiar but I can't place it.

Great project by the way, I wish I had the resources and skills to do something like this!

I realize some are aware of this, but what many individuals forget/don't know is conductor size is based upon both the load, but also the length of the run and other factors as well (it's environment). To avoid problematic voltage drop, conductors are increased in size ... sometimes several sizes ... to alleviate the effects.

This can be occur anywhere from feeders, to branch circuits. Oftentimes it's beneficial to upsize the AWG in circuits feeding items such as subwoofer amps, so that the current delivery isn't compromised in any way ... the wire acting as a choke point for stiff voltage delivey of high current.

As stated, the branch breaker can easily pass enormous amounts of current past the normal rated size;
For example, a 20 amp circuit can pass 7-8 times the rated 20amp trip amount, .. for up to a second or more.
It will allow up to 3x the rated amount for up to 10sec or so.
And the same 20amp circuit, can allow up to 1.5-2times the rated amount for a period extending as long as 30 seconds.


So those long runs of 14awg, 12awg feeding one's amplifiers/subwoofers, could very well be a limiting factor.

Thanks

Thanks, much appreciated!

I was messing with my panel yesterday and I swear it has a 200 amp breaker as the main breaker. Seems a little weak. Is that 200 amps at 240 volts, or 200 amps at 120 Volts?

IIRC 200 amps is only ~45,000 total watts. Of course, I have a gas furnace, and a gas water heater. But that doesn't seem like a lot of juice. It's not that big of a house.

200 amps is 200 amps. If one is sizing wire size in AWG, the voltage doesn't matter, thus,.. 200 amps is 200 amps.

That said, the voltage does come in to play when determining total capability to perform work ... KVA, KW.
Voltage also comes in when determining other aspects like insulation, spacing, etc.



A 200 amp single phase service has 48kva total capability, for this discussion we'll just use kw instead of kva.

P=E(I)

(200a)(240v)=48kw

or each leg individually it's still the same

(200a)(120v)+(200a)(120v)=48kw



Your panel is a 200 amp/240 volt single phase panel

Your thread should be NSFSIU - Not Safe for slow internet users lol. Looking forward to seeing the end result!

Yeah, I said 45kW because I"m not sure if I have 120V actual, I think last time I checked I'm getting 113 Volts. Wonder if I'll have to get my panel "expanded" if I want to add a 30 amp service to my basement theater area build? They only put like 3 outlets in the basement and 3 single bulb fixtures. Stupid.

ETA: back on topic, master bedroom looks pretty sweet. 320 square feet is a nice size, roughly 16 x 20. I think our Master is 14 x 15 and I've always wanted just a little bit more.
Edited by djkest - 2/26/13 at 8:23am

"Walk up to the club like, what up, I got a big c@%k!
I'm so pumped about some s#!t from the thrift shop"

I've got only a 100amp or maybe 120amp line in my house and the "main panel" is actually a sub panel. The main breaker for the panel is below the meter outside. Anybody can turn off anybody's power whenever they want and most people don't even know that there's a breaker under the meter so they'll end up calling the electric company and waiting for something that may just be a prank. Fortunately, there was one spot left on my panel to where I was able to add a dedicated 20a breaker for my sub amp that I ran with 10 gauge cable. Unfortunately, it's not really dedicated as it powers my HTPC, Rotel amp, Processor, and a few other things but it's better than being on the same line with all of my other outlets. I'm thinking about replacing the panel with one that has more spots for breakers but am not sure if it's something that i'm up to the task of doing myself.

BTW, I live in an 800 square foot condo which used to be apartments.

Been following along for awhile now. Really enjoying this build, thanks for documenting it and sharing it with us. This is awesome.

I'm rooting for a strong finish, keep up the great work.

I think you just made a watch list or three

where do you live , it looks beautiful.............

47kv's worth?

I'm not a lineman, or ever work for a power company, but what you're looking at is a 37.5 kva single phase transformer in that fourth image. If all the pics are taken from your property (which is what it appears), you're fed off the 37.5kva transformer, which is fed from a single leg of 7200v (14.4kv phase to phase). The pole to the right appears to have three phase set of 10kva transformers, and it looks like they're not connected to you in any way. I may be wrong, and it's tough to see exactly, but it appears as if there's a raceway going down the back side of the pole, and they're likely feeding it in addition to the remaining loads to the right.



As I stated, it's tough really determining the lines on the right hand pole, but I see no connection to you.

The high voltage lines are likely 7.2kv/14.4kv, that is 7.2kv each, and phase to phase that's 14.4kv. The 10 rating you see on the right side transformers (and the 37 on the left) is the kva rating, .. or total capability in kilo-volt-amps. So you, and whomever else shares that load side lateral feed running across the bottom ... pole to pole, you all are in parallel and share that feed. In open air, the ampacity is higher. The capabilities we typically associate with grouped wiring in cable assemblies, or in conduit etc, are different. Thus POCOs can thru-put more current through a given size wire than typical residential code provides for in homes.





I can see everyone's lights dimming to the beat of a big fat, heavily EQ'd kick drum, ... your HT out-building just pulsing structurally to every thump


Thanks for sharing, and best of luck

Never thought I'd see an Enya bassfest.

I don't understand how you figure your total watts? You say 21KW but that for sure would blow up that sub. You can 100KW available but you won't use that much, I bet the most you will use is closer to 10Kw and that is with everything. I don't even use 6KW(subs) to reach 130 dBs at the LP.

is it my eye or is the subwoofer in the picture not even connected?

I've always loved that setup with book shelves for treatments. It's not pretty but bet it looks/sounds perfect!

No, what are you talking about? Those are the new, you can't see them ultimate transparency king of cables. Ha ha, good eye, saw that one before, but didn't recognize that there was no wire going to the sub.