Reply
 
Thread Tools Display Modes
 
Old 05-31-2017, 03:41 PM   #11
Mini-Skoolie
 
KerryBeth1985's Avatar
 
Join Date: Nov 2016
Location: Lawrence, KS
Posts: 46
Year: 2002
Chassis: Thomas Built Mini, Microbird
Engine: 6.6 Diesel
Rated Cap: 17 pass
yep. didn't take long for this to digress into the composing toilet did it?
KerryBeth1985 is offline   Reply With Quote
Old 05-31-2017, 03:52 PM   #12
Mini-Skoolie
 
KerryBeth1985's Avatar
 
Join Date: Nov 2016
Location: Lawrence, KS
Posts: 46
Year: 2002
Chassis: Thomas Built Mini, Microbird
Engine: 6.6 Diesel
Rated Cap: 17 pass
for those actually wanting information, there's no need to shield AGM batteries. they do not off-gas or produce EMF or dirty electricity. DC current is 100% clean until it hits an appliance or an inverter. the biggest EMF producer on a solar system is the inverter which, yes, i will likely shield since i am in such a small space. if it were 50 yards away, i wouldn't sweat it, but it's 10 feet from where I sleep. metal conduit needs a separate ground.

i've read from several sources that twisting the wires will dramatically reduce electric AND magnetic fields as well.
KerryBeth1985 is offline   Reply With Quote
Old 05-31-2017, 04:35 PM   #13
Skoolie
 
Dog Rescuer's Avatar
 
Join Date: Mar 2017
Location: Tampa, Florida
Posts: 248
Year: 2000
Coachwork: BlueBird
Chassis: International 3800
Engine: T444E
Rated Cap: 24 + 3 wheel chairs.
I got a little lost trying to follow this - but I do have a question. Is it worth just having everything on a 12V system - Everything I have so far runs on 12V - I haven't figured out how to get AC - or cooling - beyond the roof vent I will install...
Maybe just a small inverter for the computer. But I may have missed the point.

I want to run everything off the solar / battery bank (so far only one battery - but a heavy duty deep cycle) - I have led and fans that run off the bus battery - and then another set of led and fans to run off the solar... I may have complicated things - I originally wanted to be able to tie it all in together - but I ran out of time.

Is there any reason to not keep everything 12V - and eliminate a big inverter?


Quote:
Originally Posted by KerryBeth1985 View Post
for those actually wanting information, there's no need to shield AGM batteries. they do not off-gas or produce EMF or dirty electricity. DC current is 100% clean until it hits an appliance or an inverter. the biggest EMF producer on a solar system is the inverter which, yes, i will likely shield since i am in such a small space. if it were 50 yards away, i wouldn't sweat it, but it's 10 feet from where I sleep. metal conduit needs a separate ground.

i've read from several sources that twisting the wires will dramatically reduce electric AND magnetic fields as well.
Dog Rescuer is offline   Reply With Quote
Old 05-31-2017, 04:38 PM   #14
Bus Geek
 
Robin97396's Avatar
 
Join Date: Feb 2016
Location: Willamina, Oregon
Posts: 4,410
Year: 1997
Coachwork: Bluebird
Chassis: TC 1000
Engine: 5.9
Send a message via Yahoo to Robin97396
KerryBeth1985; I've never seen anyone switch horses so quickly. You start a thread specifically asking about "LOW EMF for solar bus" then try to align yourself with the first person to call EMF bullshirt. Then you balk at easily available research likening that to a toilet. You know what you can do with your EMF.

Newbs, this is a place for discussion. The title was EMF, like it or not. OP, pick a side and stay on that side until your research teaches you something different.
Robin97396 is offline   Reply With Quote
Old 05-31-2017, 04:39 PM   #15
Bus Crazy
 
Join Date: May 2016
Location: Pacific North Wet
Posts: 1,425
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
I tried not to respond to this...........

Just how much EMF do you think a low voltage & (relatively) low current DC system such as solar panels are going to generate? When compared with what we are already surrounded by I would expect it to be minute.

I have read quite a bit on the subject. It caught my attention back in the late 70's and I have read off & on over the years and, personally, do not have any significant worries about health issues.

I do get concerned when the doctor suggest that I get my 5th CAT scan in less than a year.

Household/RV electrical systems creating EMF related health issues?? I personally do not believe that there is any real risk.
PNW_Steve is offline   Reply With Quote
Old 05-31-2017, 04:45 PM   #16
Bus Nut
 
warewolff's Avatar
 
Join Date: Sep 2016
Location: NY
Posts: 317
Year: 2000
Coachwork: Carpenter
Chassis: International 3800
Engine: T444E
While I get where you're coming from, the question of whether it is harmful or not is relevant to the discussion as if it is not actually harmful a response isn't even warranted, as it's illogical. That being said I have no idea.
warewolff is offline   Reply With Quote
Old 05-31-2017, 06:06 PM   #17
Bus Geek
 
Robin97396's Avatar
 
Join Date: Feb 2016
Location: Willamina, Oregon
Posts: 4,410
Year: 1997
Coachwork: Bluebird
Chassis: TC 1000
Engine: 5.9
Send a message via Yahoo to Robin97396
Most of the information available is from Russian studies. Their EMF threshold is 10% of the American threshold. I have no idea if we're biologically damaged or not from this.

I was just shocked that someone else came here and called EMF bullshirt without backing up the opinion in any way. Then the OP switched sides also calling EMF BS.

Perhaps EMF is BS. Personally I don't know. If the OP wants to learn about EMF, then that's what this thread is about as much as possible. So far we have Russian EMF standards, and then there's opinions without substantiation.

This subject has been discussed thourally on this site a few months back when inductive hot plates were the subject. Check those for EMF.
Robin97396 is offline   Reply With Quote
Old 05-31-2017, 09:08 PM   #18
Bus Nut
 
Join Date: Jun 2013
Location: Ont, Can.
Posts: 444
Year: 1995
Coachwork: Bluebird
Chassis: GMC
Engine: Cat 3116
Rated Cap: 72
There is a product that is used in clinical areas such as dentist offices. They screw it to the studs after insulating. It is lead sheeting about 3/16" thick and you cut the roll for length. Mostly used for xray equipment. Not sure of price or availability but it must help.
For conduit, if using pvc, pull a seeparate ground in each pipe and connect it with the receptacle ground and then to a ground bussbar of copper tied to the frame of the bus.
If using EMT conduit, don't count on the connectors and couplings for a decent ground. For both types of conduit #14 green is the standard ground size.
If you want to use rigid conduit it does not need a ground in it if installed properly. Screw every bit of it up tight and you are good. Tighten all locknuts tight in the boxes, panel etc.
Twisting wires as you say only creates other problems, heat, the loss of being able to remove a conductor out of a bundle. I would say no to that aspect. It also creates strange fields that can interfere with other circuits.
My 2 cents.

John
__________________
Question everything!
BlackJohn is offline   Reply With Quote
Old 05-31-2017, 11:59 PM   #19
Bus Geek
 
Tango's Avatar
 
Join Date: Mar 2011
Location: Houston, Texas
Posts: 6,046
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
The US Navy did a study on EMF effects decades ago. It determined that virtually all frequencies and power levels have some measure of biological impact. They did it because so many FCT's (Fire Control Technicians) were dying of various cancers. The cause in their case was radar but the study discovered that relatively small amounts over time have negative impact at the cellular and DNA level. And that was long before the advent of cell phones and microwave towers and such. They also found that because there are so many frequencies in the environment that unintended secondary frequencies were being formed making it almost impossible to study outside of a controlled environment. Just like when two musical notes form a third.

Welcome to Earth.
Tango is offline   Reply With Quote
Old 06-01-2017, 09:48 AM   #20
Bus Nut
 
Join Date: Dec 2015
Location: pa
Posts: 503
Year: 1998
Coachwork: 1 corbeil 2 Thomas
Chassis: 1 ford e350 2 mercedes
Engine: 7.3 powerstroke MBE906
EMF.... Twisting wires will reduce emitted EMF and also receiving EMF. with other words in case of an EMP twisted wires will pick up less energy then non twisted wires.

With DC currents there is no EMF , the frequency component is missing. The magnetic component is there. Twisting wires will help there also as to cancel out the fields.

If you use an inverter in a metal box and with a low frequency ( 60 Hz) transformer like OUTBACK 3648 ( 48 vdc)you will generate less EMF since the transformer is a very effective filter, again both in as out.
Direct switching inverter use much smaller transformers at a higher frequency ( 40 Khz and higher). They invert 12 volt to 200 vdc and then use a second switcher that makes 60 Hz at 120 vac. Advantage is higher efficiency and lower weight.

The lowest EMf is probably coming from a rotary inverter. ( 12 VDc motor direct coupled to 120 VAC alternator. You have to keep the brushes in good shape and or put it into a metal box. A system like that since it has a mechanical nature is almost completely EMP proof.

Running wires in metal conduit is a very good idea, for EMF and EMP protections but also against rodents and fire.

The common thought about grounding is that you want to create one common point.

If you are inside the bus and you create your own EMF inside as well then grounding to earth is no use and you can only shield yourself or better use conduit as you mentioned . It is important that connection from conduit to boxes are properly made. Clamping connections are better then then the style with a setscrew.

As said before DC is better and for cooking a normal electric heater/ water cooker etc is fine. Water cooker is very efficient as the heat is generated inside the medium.

Microwaves are not that efficient in there conversion at all but they are fast.

It is good to at least think about all these things

Later J
joeblack5 is offline   Reply With Quote
Reply

Tags
electrical, electrical grounding, low emf, solar

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Virginia Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 04:16 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.