Begin forwarded message:From: Tim Ross <tim@architype.co.nz>Subject: Fwd: High Street - Distribution Board and EMFDate: 20 November 2019 at 5:36:58 PM NZDTTo: High St Cohousing <ucolbuild@gmail.com>, Frances Ross <frances4ross@gmail.com>, Stefan Box <stefan@reececonsultants.co.nz>, Alex King <alex@king.net.nz>, Catherine Spencer <cmspencer.nz@zoho.com>, Rainer Beneke <rainer.ucol@gmail.com>Hi Guys,Please see response below from our electrical engineer to my questions.Cheers,Tim.---------- Forwarded message ---------
From: Stew Macleod <Stewart@macleod.associates.co.nz>
Date: Wed, Nov 20, 2019 at 5:30 PM
Subject: RE: High Street - Distribution Board and EMF
To: Tim Ross <tim@architype.co.nz>
Tim
See Below
Regards,
Stew MacLeod
Director/Electrical Engineer
First Floor
Gridiron House
431 Princes Street
PO Box 1118
Dunedin 9054
P +64 3 477 2402 Ext. 1
F +64 3 477 2082
M +64 021 2800 551
E stewart@macleod.associates.co.nz
W www.macleod.associates.co.nz
This message and accompanying data is confidential. If you aren't
the intended recipient you are hereby notified that any use,
dissemination, distribution or copying of this message is prohibited.
If you have received this message and/or attachments in error, please
notify us immediately then destroy the message and attachments.
From: Tim Ross [mailto:tim@architype.co.nz]
Sent: Wednesday, 20 November 2019 3:55 p.m.
To: Stew Macleod
Subject: Fwd: High Street - Distribution Board and EMF
Hi Stuart,
We are still trying to resolve where to relocate the main distribution board the High St project.
We have one future resident who is concerned about the location of the main distribution board and the proximity to her unit.
I think we breifly discussed this last time we meet and you mentioned that the EMF drops off very rapidly from electric appliances etc.
Couple of questions:
1. Would the EMF from the distribution board be any greater than that coming from the main cable entering the site?
Much the same
2. At what distance from the distribution board would the EMF be similar to background levels of electromagnetic radiation?
The background level is around 0.65 mGauss, a switchboard might have 30 to 50m Gauss at 300 mm away but at one metre is probably about 1 mGauss
3. Is there an easy way of measuring the EMF at different distances from a distribution board to demonstrate that this is not an issue?
Yes you can borrow my instrument and try it.
4. Is there anything we could do to contain the EMF from the distribution board if it was in close proximity to someone's property?
You can get a metal called cold rolled grain orientated steel which can be used for shielding. We could put some of this behind the board. It takes time to get from overseas.
Out of interest some appliance generate more Gauss that people think, i.e. electric jugs and blankets, even shaves but because people are only exposed to them for a short time (The Dose Rate) they are considered OK.
At this time and there has been many studies there is no evidence to suggest that there are problems.
In saying this I don’t believe you should keep your cell phone in your ear for long periods.
Thanks,