A Loose Point is a Hot point?????? - Electronic Circuits Projects Diagrams Free

thenewton · 14th November 2007, 06:21 PM

hi everybody , hope all willbe enjoying best of health and luck.
I wish to know that

WHY IN ELECTRICAL ENGINEERING ,ITS CALLED THAT A LOOSE POINT IS A HOT POINT.
PLZ ANY BODY CAN EXPLAIN THIS
REGARDS

audioguru · 14th November 2007, 06:29 PM

A loose connection between wires causes a resistance that makes heat when high current flows through the connection.

I worked in a big building that was being constructed. The inspector took an IR photo of the electrical panel to see if anything was hot due to a loose connection.

OutToLunch · 14th November 2007, 06:57 PM

on the subject of inspections, ThisOldHouse.com has a good series of photo galleries on "Home Inspection Nightmares"

http://www.thisoldhouse.com/toh/phot...220600,00.html

that's the first one - i believe they're on #10...

Sceadwian · 14th November 2007, 11:55 PM

Thermal cameras are really cool, I would love to get my hands on one to play with, it's amazing what you can learn with them.

thenewton · 16th November 2007, 01:23 PM

Hi audioguru Thanks for replying . u said loose connection between wires causes a resistance that makes heat when high current flows through the connection.but i want to know that y it hapens when current flows from here
do u know its logical reason.
Regards

dknguyen · 16th November 2007, 02:03 PM

Quote:

Originally Posted by thenewton

Hi audioguru Thanks for replying . u said loose connection between wires causes a resistance that makes heat when high current flows through the connection.but i want to know that y it hapens when current flows from here
do u know its logical reason.
Regards

When connections are loose it means there is less contact between conducting surfaces so there is less area for the current to travel through and more resistance. When current flows through a resistance it produces heat...is that what you mean? You might want to reword your question again so maybe it is a bit more clear.

OutToLunch · 16th November 2007, 02:06 PM

the term "hot" could also be referring to a live wire. If there are exposed wires that are tied to the mains, then they can be considered "hot" which basically means don't touch them or you'll get burned/cooked/fried.

in home wiring (at least here in the states), the "hot" wire for a 120V run would be the black wire while the white wire is neutral.

OutToLunch · 16th November 2007, 02:25 PM

Quote:

Originally Posted by Sceadwian

Thermal cameras are really cool, I would love to get my hands on one to play with, it's amazing what you can learn with them.

off topic again, but this SNL clip (which, btw, is pretty funny) shows another use for the IR camera...

http://teamsugar.com/group/247389/blog/286504

audioguru · 16th November 2007, 05:10 PM

Sony video cameras were advertised as having "night vision". People noticed that they could see through bathing suits at the beach. Then Sony made them with an IR blocking filter.

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14th November 2007, 06:21 PM	(permalink)
thenewton	A Loose Point is a Hot point?????? hi everybody , hope all willbe enjoying best of health and luck. I wish to know that WHY IN ELECTRICAL ENGINEERING ,ITS CALLED THAT A LOOSE POINT IS A HOT POINT. PLZ ANY BODY CAN EXPLAIN THIS REGARDS

14th November 2007, 06:29 PM	(permalink)
audioguru	A loose connection between wires causes a resistance that makes heat when high current flows through the connection. I worked in a big building that was being constructed. The inspector took an IR photo of the electrical panel to see if anything was hot due to a loose connection. __________________ Uncle $crooge

14th November 2007, 06:57 PM	(permalink)
OutToLunch	on the subject of inspections, ThisOldHouse.com has a good series of photo galleries on "Home Inspection Nightmares" http://www.thisoldhouse.com/toh/phot...220600,00.html that's the first one - i believe they're on #10...

14th November 2007, 11:55 PM	(permalink)
Sceadwian	Thermal cameras are really cool, I would love to get my hands on one to play with, it's amazing what you can learn with them. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."

16th November 2007, 01:23 PM	(permalink)
thenewton	Thanks but i need more detailed answer plzz Hi audioguru Thanks for replying . u said loose connection between wires causes a resistance that makes heat when high current flows through the connection.but i want to know that y it hapens when current flows from here do u know its logical reason. Regards

16th November 2007, 02:06 PM	(permalink)
OutToLunch	the term "hot" could also be referring to a live wire. If there are exposed wires that are tied to the mains, then they can be considered "hot" which basically means don't touch them or you'll get burned/cooked/fried. in home wiring (at least here in the states), the "hot" wire for a 120V run would be the black wire while the white wire is neutral.

16th November 2007, 05:10 PM	(permalink)
audioguru	Sony video cameras were advertised as having "night vision". People noticed that they could see through bathing suits at the beach. Then Sony made them with an IR blocking filter. __________________ Uncle $crooge