>>"Jea48, please find the technical data to back up your statement. Dont just disagree , prove your statement"<< [Mapleleafs3] >>>>>>>>>> This may be on a grand scale but you will get the idea... http://205.243.100.155/frames/longarc.htm ======== |
">>Reading it I notice that "Hospital Grade" means it has certain characteristics, like tolerance of "Abrupt removal" (yank the wire) which are probably important in the Hospital environment, but which IMHO are not relevant to the outlets we use for audio systems."<< [Eldartford] =========== Probably true. Different Hospitals may have differering standards for what they require for the contact pressure of a hospital grade receptacle. One hospital that I know of in particular in my city, their Bio-Med department, requires a minimum of 4 ounces of resistance when removing a plug from an electrical outlet. By the way the only two manufactures of hospital grade outlets the hospital specs in any new installations or replacements is Hubbell and Leviton. Key word resistance, contact pressure. ============== On another forum, Audio Asylum, a non hospital grade receptacle that is spoken of very highly is the Hubbell 5362 (5-20R) receptacle. A non plated brass contacts with a brass non plated receptacle supporting yoke, strap. Another recommended Hubbell receptacle is the HBL8300H (5-20R) receptacle. Again non plated brass contacts and a brass non plated supporting yoke. Buy the way this is the receptacle that Albert Porter uses in his Cryoed "Porter Ports". I presently am using the Leviton 20 amp hosp grade outlets which I think sound very good. The Leviton outlet uses non plated brass contacts, but unlike the Hubbell outlets I have described where the Hubbell uses a brass supporting yoke, the Leviton uses a steel supporting yoke. Magnetic material.... I have read many negative comments in regards to a steel supporting yoke, strap. So now I will buy the HBL8300H and the 5362 Hubbell recepts and find out for myself. What is the rave out there now, the best outlet? Many talk of the Oyaide SWO-XXX http://www.audioexcellenceaz.com/oyaideoutlets.htm |
>>"Jea48, can you please explain the benefit of "Contact Pressure"?'<< >>>>>>>>> Here is some reading material for you. I am not promoting their product. http://stereophile.com/artdudleylistening/1103listening/ ============== You will notice in one of my posts I mentioned the Hubbell 5362, 20 amp outlet. I stopped by an electrical supply house tonight and picked up a couple of them. I was given a couple of the HBL8300 (nickel plated) 20 amp hosp grade outlets a while back. Never hooked them up after reading the bad reviews about them. For what it is worth I grabbed an extra PC I had laying around. I plugged the PC into one of the new 5362 outles and pulled it out feeling the the pressure of the contacts. Pushing in, pulling out. LOL, LOL...Can't believe I just said that! Next I tried The HBL8300. Imho the plug pushed in harder and pulled out harder. Is it due stricly to the Hot and Neutral contacts or is it due to the hosp grade ground connector??? ============== 01-30-06: Nerspellsner >>"Jea48, I have heard of that device but I have never used it. I remember hearing that the device is connected to the ground pin only. It has to stay connected to a hospital grade outlet with 4 oz of pressure for a certain amount of time."<< >>>>>>>>> After reading your post now that I think about it your are right it tests the ground receptacle of the outlet. I still like your testing method though. Imo only the Hubbell would survive, that is the HBL8200 and the HBL8300 hosp grade. ==== Jim |
Follow Up ++++++ "Next I tried The HBL8300. Imho the plug pushed in harder and pulled out harder. Is it due strictly to the Hot and Neutral contacts or is it due to the hosp grade ground connector???" ============== I did not want to leave the impression that the difference in tightness was due to the ground prong, it was not. I did try the test with a two wire cord and plug also.... >>>>>>>>>>>> >>"It means that someone has been clever enough to charge audiopiles who don't know anything about electricity a ton of money for -- wire.'<< [Bojack] >>>>>>>>> Bojack did read page 2 of the link I provided. http://stereophile.com/artdudleylistening/1103listening/index1.html |
Nerspellsner, I found a few errors in the Stereophile article. Besides that one you mentioned, The Hubbell HBL8300I receptacle. The I does not stand for plated, it stands for ivory. The picture of the two outlets, the top outlet sure looks to me to be the non nickel plated Hubbell HBL8300H, not the plated HBL8300. On the whole they did a pretty good job with the article for being laymen when it comes to electrical. Jim |
Studioray, I installed the Hubbell 5362 outlets for my ARC VT50 power amp and my Sonic Frontiers Line One preamp. Plugged things back in and turned the system on. Right off I could hear a difference. As I have read from others the bass was deeper. I first started with a Female vocal and did notice siblence sounds, the dreaded sss sss. I was hoping that was due to the fact the outlets were new and needed some break-in time. For lack of anything else I could think of to plug into the two outlets and let them cook for about 24 hours, I used two table lamps with 3 way bulbs. I turned the switches on the lamps to the highest wattage. Tonight I unplugged the lamps and plugged back in the equipment. Turned things on, let the system warm up for about a half hour and sat down for a listen. Siblence were gone. The bass from my system is deeper. The sound is darker, sound stage more layered. The Hubbell 5362 beats the Leviton Hospital Grade outlets hands down. It has to be that steel supporting yoke,strap. Or maybe the Hubbell is more dampened. I still have to change the outlet for the CDP, one thing at a time. And then there is the outlet cover plates. I am presently using the Leviton magnetic Stainless steel plates with a nylon trim screw. I know Nerspellsner, I am guilty, busted! This weekend I will experiment with the nylon outlet cover plates. Also I am Still going to try the Hubbell 8300H Hosp Grade duplex outlets. I just need to make up my mind whether I am going to buy the Cyroed outlets. Studioray, You did not mention in your thread if you have dedicated audio branch circuits. |
Quote Chapter 4 of NFPA 99 (2005 edition) addresses the electrical systems in health care facilities. It requires the electrical installation to be in accordance with NFPA 70, National Electrical Code (4.3.2.1). Following are some of the commonly referenced requirements: Leviton Hospital grade plug and receptacle testing. Hubbell white paper for testing of hospital grade receptacles used in Canada. Cheap basic Receptacle tension tester. |
