ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
120/208 gives 240? please clarify
by gfretwell - 07/15/20 06:07 PM
Code Violation or just not good Practice?
by gfretwell - 07/15/20 06:01 PM
NESC question
by gfretwell - 07/15/20 03:40 PM
Questioning the electrical norms
by HotLine1 - 07/13/20 12:40 PM
You will never guess
by BigB - 07/13/20 09:45 AM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
0 registered members (), 17 guests, and 12 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 14 of 14 1 2 12 13 14
Re: Norwegian power? [Re: Meadow] #219218 03/30/18 08:10 AM
Joined: Jun 2014
Posts: 114
D
dsk Offline
Member
Things takes time, the building process is not finished yet, and the cable are still running trough the house. :-)

dsk

Test Equipment:
Large Selection of Test Equipment For Electrical, HVAC, Test & Measurement
Large Selection of Test Equipment For Electrical, HVAC, Test & Measurement
Re: Norwegian power? [Re: Meadow] #219567 08/28/18 02:54 PM
Joined: Jun 2014
Posts: 114
D
dsk Offline
Member
They has had proffesionals there now, and the cables are now propery put in the ground with the right kind of cable, and terminations.

Attached Files 2018-08-18 11.00.33.jpg
Last edited by dsk; 08/28/18 02:58 PM.
Re: Norwegian power? [Re: Meadow] #220040 04/19/19 10:29 AM
Joined: Jun 2014
Posts: 114
D
dsk Offline
Member
I am wondering how they will do it, but someone was telling me that they want to convert the area from 230V TT to 400/230 TNC-S

My guess will be a transformer with both voltages, and dirstibution of of the 400V system to new houses.


Re: Norwegian power? [Re: Meadow] #220043 04/20/19 06:27 PM
Joined: Dec 2001
Posts: 2,485
T
Texas_Ranger Offline
Member
They could convert the existing buildings too, it'd take new cables and some inside work too. I guess a dual-voltage transformer wouldn't be enough for running both systems in parallel since the old setup requires a floating star point (IT) while the new one needs an earthed one (TN).

Re: Norwegian power? [Re: Meadow] #220050 04/26/19 03:56 AM
Joined: Jun 2014
Posts: 114
D
dsk Offline
Member
The old system is a TT system so it will probably be OK, In the neighborhood they even have a transformer with 2 separate secondary winding's too.

dsk

Re: Norwegian power? [Re: Meadow] #220058 05/02/19 08:01 PM
Joined: Dec 2001
Posts: 2,485
T
Texas_Ranger Offline
Member
I suppose they could convert the older parts to 133/230 V TT if they're currently 133/230 IT with earthed local PE. That'd be the Belgian system, once common in quite a few European countries. They'd still need a transformer with separate secondaries I guess. If all existing supplies are single phase (i.e. only two out of the three phases are supplied, giving 230 V) they could replace the distribution and reconnect the existing buildings to 230 V line to neutral instead.

Re: Norwegian power? [Re: Meadow] #220062 05/03/19 04:30 AM
Joined: Jun 2014
Posts: 114
D
dsk Offline
Member
It is already 133/230 TT, so I guess that is the way they will do it.

Re: Norwegian power? [Re: dsk] #220764 04/29/20 12:54 PM
Joined: Apr 2020
Posts: 9
W
WaterIngress Offline
New Member
Originally Posted by dsk
It is already 133/230 TT, so I guess that is the way they will do it.



138/240Y TN-S without the neutral distributed is an ideal system.

If I'm not mistaken 127/220Y is very common in South America.



Re: Norwegian power? [Re: Meadow] #220819 05/27/20 11:43 AM
Joined: Apr 2020
Posts: 9
W
WaterIngress Offline
New Member
Here is an interesting PDF (yes I know its in Norwegian but can be translated). Stresses importance of RCDs in IT systems due to the lack of interconnected ground systems between buildings:


https://automasjonslab.files.wordpress.com/2018/11/jording.pdf

Page 14 of 14 1 2 12 13 14

Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Joe Tedesco
Joe Tedesco
Boston, Massachusetts USA
Posts: 2,749
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
Admin 8
Popular Topics(Views)
267,461 Are you busy
202,090 Re: Forum
190,651 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3