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Old Yesterday, 08:18 PM   #1
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Default prevent lights in public hallways from flickering

On one of my previous jobs I over heard a foreman telling an electrician to wire up the public hallway lights in a residential high rise tower so that each
public hallway light has its own separate neutral, this will prevent the public hallway lights from flickering.
If you had one single neutral run from the electrical closet, then pigtailed all the public hallways lights to that single neutral, could some of the lights in that chain back feed into other lights, which will cause a slight change in voltage
which leads to lights flickering?

what does the foreman mean by each light should have its own separate neutral? does he mean each light should have its own neutral run back to the neutral bar in the electrical closet?
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Old Today, 09:40 AM   #2
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Quote:
Originally Posted by wire tags View Post
on one of my previous jobs i over heard an idiot telling an electrician to wire up the public hallway lights in a residential high rise tower so that each
public hallway light has its own separate neutral, this will prevent the public hallway lights from flickering.
If you had one single neutral run from the electrical closet, then pigtailed all the public hallways lights to that single neutral, could some of the lights in that chain back feed into other lights, which will cause a slight change in voltage
which leads to lights flickering?

What does the foreman mean by each light should have its own separate neutral? Does he mean each light should have its own neutral run back to the neutral bar in the electrical closet?
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Old Today, 01:37 PM   #3
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If you like wasting wire, running very large conduit, extra work, why not? He probably heard it on the internet, it must be true, right?

If you're gonna go that far, run a dedicated circuit for every light from the panel.

Might as well install a separate service for each too.

Where do we stop with this?

Sent from my new phone. Autocorrect may have changed stuff.
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Old Today, 02:09 PM   #4
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I had a foreman on a high rise that ran the fire alarm crew. It was an assisted living building with a hotel like layout. Each unit had a horn/strobe inside so if the fire alarm went off you can see and hear it in the unit.

When it came time to test the system with the programmer he noticed there were no horn/strobes in the unit. The fire proclaimed he put them all in. The fire alarm program opened a random unit door from the main floor hallway and pointed into the unit and said see there are none.

The foreman brought him into the bedroom of the unit and pointed to a horn/strobe mounted on the bedroom wall about 36” off the floor.

The programmer said that’s not where the engineer specified on the print. To that the foreman pulled out his plans and pointed to one of the notes on the side of the prints.

It said “horns must be 80 decibels at pillow height”.

To this day he is probably still nicknamed “pillow height”


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