spsalso states "Interestingly there has been two phase electricity, also. But since you need 4 wires to run two phase but only 3 wires to run 3 phase, I doubt it's in much use anywhere."
There is 3 phase supply wiring to the building (Wye or delta) . No 2 phase in this building (Theoretically...
Js5180 (Computer) commented "I've also noticed that some of the lights appear to go out in synch with the blue flashes going out, but not necessarily the ones directly horizontal to them. Someone mentioned three phases. Are different floors on different phases? Would this mean that appliances...
NolaScience posted "This place was built in 1981. Tankless water heaters were as uncommon as mobile phones in those days. And I found a water heater in an image of the remaining structure"
Can't argue with picture of tank in debris. Only thing is that water heaters only last 10 years or so so...
Probably 200A electric service per condo or more if they have tankless water heaters. My Steibel 21kW tankless has two 50A breakers for total of 100A. For a large family you need a 36kW 180A tankless meaning electric panel over 200A. Or they could have natural gas either per unit or central.
No I don't think a 100-200 lb AC unit falling off the roof in any way should have caused a collapse like what happened. Building supports should have been seperate ftom pool deck columns. Just like when I designed a deck behind a house. Made it free standing and not attached directly to the...
waross posted a picture of a Rheem tie down strap for a split system AC unit. Looks almost home made. Here are pictures of hold downs on AC units installed at my house:
1. Picture of one of four bolts holding down a 3.5 ton Carrier (Factory provided holes but the top grill has to be removed to...
No telling what happened at Champlain. Due to increases in efficiency in new units and becase R22 refrigerent used even 20 years ago in new unitw, these units have probably been replaced at least twice since the early 80s. Maybe the installer didn't bolt down but should have in a hurricane prone...
If you have a residential unit not tied down you had a jack leg installer. The three I've had at my house were all fastened to the 4 x 4 ft concrete slab first put in for that purpose. Codes if you have any specify it. Guess I have to dowload a Rheem manual. Simply crazy to think you don't bolt...
All, even composite have to be designed for mounting even at your house. And on the tall Mitsubishi I put in the unit had heavy duty tabs with a hole in it that extended 3" from unit for easy installation. No regulatory bdy would accept loose units not bolted down. Not inland either due to wind...
There are factory holes at the bottom of the units often offset so you can get to them and bolt them down without throwing a strap over the top of the AC unit. Even in the early 80s.
As I posted earlier, I'm an HVAC/ Energy conservation engineer. These units are required to be bolted down. I've installed several units myself, even in the early 1980s. Every heat pump/air conditioner I've ever seen has factory holes at the bottom of the units for mounting. Some are easily...
Just wanted to comment with regard to A/C units on the roof(posted by MarkBoB2). I was an HVAC /Energy Conservation engineer. The units on the roof are small units like you would have in your home probably 3 to 5 tons (12000 btu/hr = 1 ton). Codes require them to be bolted down.
Also they are...
