ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Ground Rods: Installation and Hook-Up
by renosteinke - 11/29/22 07:43 PM
Colt Firearms Switchbox
by NORCAL - 11/29/22 01:04 AM
Happy Thanksgiving all!
by Bill Addiss - 11/24/22 08:37 AM
Perfect work light?
by gfretwell - 11/22/22 12:48 AM
copper prices where you live and inflation
by gfretwell - 11/21/22 01:52 PM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
0 members (), 23 guests, and 11 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#11147 07/01/02 11:10 PM
Joined: Oct 2001
Posts: 30
T
Member
I am reviewing the use of an "In-Roadway lighting" system which is typically used at crosswalks. Many of these systems operate at 12 VDC, 3 amps, with LED lamps, operating from wires placed in a sawcut in the road surface. These systems are fairly safe, being similar to low voltage landscape lighting.

One system operates at 38.4 kHz, about 30 volts, perhaps 4 amps. The LED lamps are inductively powered from the cable.

I'm trying to determine what the shock hazard at 38.4 kHz would be. any comments or suggestions on where to look?

#11148 07/02/02 01:44 PM
Joined: Aug 2001
Posts: 7,520
P
Member
Tom,

I don't think 38kHz poses any more of a shock hazard than 50/60Hz or the same voltage.

In fact, I remember reading somewhere in the past the normal 50 or 60Hz power frequencies are actually just in the critical range which is most likely to cause ventricular fibrillation. I'm not sure what to start looking to confirm that, though.


Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC Now Available!
 
* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
electure
electure
Fullerton, CA USA
Posts: 4,289
Joined: December 2000
Top Posters(30 Days)
NORCAL 5
Trumpy 3
Popular Topics(Views)
300,312 Are you busy
229,984 Re: Forum
214,795 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5