Home Improvement Stack Exchange
Home Improvement Stack Exchange

Questions tagged [ups]

18 questions
11
votes
8 answers

Are 6 volt fluctuations in a 120 volt home outlet harmful to equipment?

I live in an older house in New England. I bought an UPS (uninterruptible power supply) to plug my computer into. This particular UPS has an input and output voltage reader on it. I notice when my window AC unit and my computer are running, the…
Johnny5Tech
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7
votes
3 answers

Is there a safe and compliant way to run consumer UPS power through house wiring to an outlet?

I would like to remove an existing cable from the breaker panel, that feeds a single home run outlet, and wire it to a consumer UPS that I will locate near the panel, through a junction box. Questions: To join the power cord from the UPS to the…
jay613
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5
votes
4 answers

Should a UPS be unplugged when working on the electrical circuit it is plugged in to?

I need to do some electrical work on a circuit in my home. One of the outlets on the circuit has a UPS battery backup plugged into it. The UPS is tucked away behind a lot of other equipment, so I'd rather not have to unplug it if its not necessary.…
asgallant
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3
votes
2 answers

Home UPS: grounding, isolating, connecting to subpanel

I'd to deploy a UPS system as shown below. My primary need is the setup shown in black, a simple setup feeding directly to my equipment. The transfer switch is 15A which is more than I need. Considering the black setup: At point "A", what can I use…
Art
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2
votes
1 answer

Why does my Uninterruptible Power Supply produce lower watts on backup battery than line power for my pellet stove?

SOLVED Problem: When my UPS does the switch-over from line power loss, the pellet stove runs but you can hear the stove motors slow down, and the wattage meter on the UPS drops from ~150w nominal to ~100w nominal. I say "nominal" because the auger…
Joshua Jensen
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2
votes
5 answers

Use a 24V LifePo battery in a UPS designed for lead acid batteries?

I have an existing APC 1500 UPS, designed for use with 24v lead acid batteries and want to know if it would be possible to replace my dead lead acid battery with a 24V Lithium Iron Phosphate (LFP) battery instead. The 24V LFP battery comes with a…
williamc
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2
votes
1 answer

Can a switchover to backup power be seamless for a whole house?

We're contemplating a backup generator for the house. Most of them have transfer switches that kick in quickly, and automatically, but naturally the generator has to start, spin up, and stabilize before switching over. Is there a way to make that…
Will Hartung
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1
vote
0 answers

Using a UPS on 3-prong, ungrounded outlets and worrying voltage leak

it seems this question is rather common. I live in a rented appartment built 70+ years ago. Back then, the building was built on a budget, and it was code-compliant to have ungrounded 1-phase 120VAC outlets (still visible in corridors), and…
P. N.
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1
vote
2 answers

Is this UPS Socket Defective?

I have 2 UPS of the exact same model. In one UPS, all of my Type B Plugs would not fit In the first image, the hole on the socket is on the edge. My Type B Plugs (3 pin) would not fit. On the second image, the hole on the socket is on the middle and…
avg9957
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1
vote
2 answers

Is there any way to use an Uninterruptible Power Supply properly when there's no ground wire in the outlet?

Update 2022-07-04: I read up quite a bit on pure sine wave UPSs and bought one and so far so good. The whole problem may not have been about grounding but about the garbage sine wave produced by non-sine wave UPSs. I have another compute running on…
Shovas
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1
vote
0 answers

Attaching a ground wire to a prong that plugs into an outlet adapter

The outlet shown in the image below doesn't have a ground wire connecting to its receptacle. A friend of mine is helping me setup a ups that requires ground wire, however what he did was run a ground wire from the basement and connect it to three…
Ben
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0
votes
0 answers

UPS 30 AMP 240V question

Okay here is what I am trying to accomplish. I have a computer rack in my basement and since I am an IT guy to the extreme it has a lot of servers in it. I have a UPS 240V 6000KVA unit. It is rack mounted at the bottom of the computer rack. The…
Charles in CT
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0
votes
3 answers

Can a Modified Sine Wave input damage an OLED TV?

I live in an area where power cuts are common. In order to protect my TV from the sudden power loss from a power cut, I am planning to buy a uninterruptible power supply (UPS). Most of the cost effective UPSs have a modified sine wave. Will this…
AB2008
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0
votes
2 answers

NEMA 5-20 to 5-15 adapter - is it safe?

I bought a large UPS for my server and didn't realize it comes with a NEMA 5-20 plug. We're in a residential setting and don't have those outlets. I see Nema 5-20 Female to Nema 5-15 Male Power Adapters but it seems not safe to me, if the device is…
mlevin77
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0
votes
2 answers

How do I wire a single phase 240v APC UPS from US split phase power?

I want to wire in a 200/208/220/240v single phase APC UPS, the APC Smart-UPS RT 6000VA, there are both single and split phase versions of this, I have the single. It has the standard brown blue green wire going into it, and the manual mentions…
super7800
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