Guest viewing is limited
So Allianz insurance inspector has pulled up a C3 ( I know it’s not mandatory) about magnetic effects from a circuit.
so we have a small 9-way board with cables entering via galvanised trunking and thru 3 20mm couplers.
They’re all single phase circuits but he’s highlighted one circuit that has the line coming into the board thru one coupler and the neutral coming in thru a different coupler.
What’s your thoughts on that?
 
I too would be inclined to C3 this. Unless the circuit current is very high, the effects of eddy currents are likely to be very small.
 
probablyi nsignificant if the current is low. how easty is it tomove the N to the L entry??
 
There’s not a lot of room with the other circuits which is why it may have been installed like that.
someone said before that it’s mainly 3-phase you have to worry about with eddy effects.
 
So Allianz insurance inspector has pulled up a C3 ( I know it’s not mandatory) about magnetic effects from a circuit.
so we have a small 9-way board with cables entering via galvanised trunking and thru 3 20mm couplers.
They’re all single phase circuits but he’s highlighted one circuit that has the line coming into the board thru one coupler and the neutral coming in thru a different coupler.
What’s your thoughts on that?
C3 every time have you seen the results of Eddy current heating
'
 
probably easier to move the cable than to calculate out the heat gain from the eddy currents
and the acceptable heat loss through the enclosure.
 
Technically incorrect but with a small circuit passing through a thin steel enclosure, unlikely to cause any noticeable effect. IIRC John Ward made a demo video showing that even with 100A passing through two separate knockouts in a CU, or so the temperature rise was only a degree or two. It becomes a problem once you get up into the hundreds of amps, with heavy gland plates on transformers etc.
 

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Green 2 Go Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses Heating 2 Go
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Advert

Daily, weekly or monthly email

Thread starter

Joined

Thread Information

Title
Query about eddy effects
Prefix
N/A
Forum
Commercial Electrical Advice
Start date
Last reply date
Replies
7

Thread Tags

Tags Tags
eddy query

Advert

Thread statistics

Created
bhamoggy,
Last reply from
Lucien Nunes,
Replies
7
Views
1,713

Advert

Back
Top