Recent content by IndyMike

I would think that the break frequency for the ferrites would be well above the X10 120KHz frequency.   The PZZ01 blocking filter that Ano linked to would seem to be a good fit given the amount of current that you are dealing with.  It's also a pretty reasonable price compared with years ago...

  You nailed it.  Gas prices were directly linked to crude prices back then.  On July 3, 2008 crude spiked above $145/bl.  How quickly I forget recent history...   Sorry for the diversion

I had not noticed that lleo was in NJ.  I have a sister in the Princeton area - the rock structure would certainly be an issue for a ground source system.   My data points for installing ground loops are based on the fact that we regularly drill wells in the area at 200+ feet and think nothing...

I've been lurking on this topic for awhile - interesting "additions" in the area of variable speed condensors and control systems.  I say "additions" because I have yet to see a study that provides actual numbers on energy savings.   On the latest topic: Reduced ambient air temperatures at the...

1) Make sure that the cap is wired downstream from the choke (closer to the lamps).  If the cap is closer to the switch it will present a 2.65 ohm load at 4KHz (.265 Ohms at 40K) and load your UPB signals. 2) Putting the filter closer to the switch is better.  You need the inducance of the wire...

Neurorad,   Low voltage electrical hoses have a split ring on the male end which interfaces to two contacts in the outlet.  The hose end is "clocked" via a molded in tab to align the split ring with the contacts.   Because of the molded tab, I don't believe you can use the new hose with your old...

Three of the timers are controlling Fan/Light/Heater combo's.  It's been a long time, but I'm guessing they're ~1700W.   As a side note - how did your mechanical timer fail?  Resistance heaters are normally rather relay contact "friendly".  They don't arc/weld the contacts like inductive or...

I know you were looking to automate this with a temp sensor for feedback....   ...but these are really simple: http://www.electricsuppliesonline.com/leviton-ltb60-1lz-timer.html   I have 5 of them in my bathrooms (12 years).  It's just about the only thing I haven't automated - they won't die. 

  That is the FAQ that I meant to post - Thanks for the catch Brian.  I've corrected my post so as not to confuse people (like myself).

Tech note from Lutron on AFCI's tripping with over 1000W of dimmable loads connected.  They offer a number of recommendations for preventing nuisance trips: http://www.lutron.com/TechnicalDocumentLibrary/AFCI_FAQ.pdf   The technote appears to written with incanscent lamps in mind (they refer to...

  Here's a nice reference for panel load calulations from Siemes.  It's rather simplistic, but it consolodates many sections of NEC code into a easy to follow calculation.  Page 58 gives example calucations for a 2000 sq foot home (with NEC references)...

  Depending on the year of construction and local code you'll be dealing with different degrees of fire rated walls, floors and ceilings.  This and metal stud framing generally don't translate into good RF performance.   If line of sight devices perform well it's possible that a well placed...

A related white paper from Lutron on the subject.  They implemented a analog filter along with the standard PLL to accurately track the zero crossing: http://www.lutron.com/TechnicalDocumentLibrary/Power_quality.pdf   As a side note (not the problem in this case) - do not add a capacitor to the...

When I saw the topic I was thinking it was in reference to a M1 Abrams (main battle tank).  Possbly showing how you could clean seriously ground in dirt with a Bissel - 60+ tons can do a number on carpet.   Del - is that an outlet or a switchbox?  Looks very high for an outlet, an low for a switch. 

The report indicated that the Lady in question was pulled over on CA 15 while driving 80 in a 65 zone.  I've driven the 15 quite a bit over the years.  Much like the 294 in Chicago or the 465 in Indy, traffic moves at anywhere from 5 mph to 80 depending on conditions.  Under good conditions, CHP...