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Forum topic by Bothus posted 11-12-2009 03:47 PM 1530 views 0 times favorited 23 replies Add to Favorites Watch
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441 posts in 3351 days

11-12-2009 03:47 PM

Topic tags/keywords: question

... so here’s a question for you.

I just installed security cameras around the perimeter of the house. My 200 AMP service panel is also outside.

I plan to add a sub panel inside, but is there any way this sub panel can bypass the main 200 AMP breaker outside?

The point being that I want to keep my cameras on if someone flips the main breaker.

I should probably just put a big UPS system to support the cameras but I need to add a sub panel anyway so I thought I’d ask.



-- Jerry Boshear, Professional Kitchen Designer, amature woodworker.

23 replies so far

View ChunkyC's profile


856 posts in 3429 days

#1 posted 11-12-2009 03:54 PM

Yes you can but the sub will need to have a main breaker.

-- Chunk's Workshop pictures:

View GFYS's profile


711 posts in 3646 days

#2 posted 11-12-2009 04:37 PM

wrong! By NEC power main must be accessible from the exterior. If the Main splits to multiple structures, each structure is require to have a disconnect at the sub entrance. You can lock the box but then all a burglar would need to do is pull the meter. Get a battery backup.

View JimF's profile


144 posts in 3468 days

#3 posted 11-12-2009 07:15 PM

I just bought a new house which does not have disconnect outside, so I looked up the NEC requirements. NFPA 70A-2005 Section 230.70 (A) (1) for one and two family dwellings says that the disconnect can be outside or inside, but if inside must be close to where the service enters. However, in looking for the NFPA reference, I saw where some local building codes require a disconnect on the exterior of a building. You probably should check local requirements and/or hire a qualified local electrician.

-- Insert clever tag line here

View GFYS's profile


711 posts in 3646 days

#4 posted 11-12-2009 07:33 PM

True! I remembered partialy! :) Still the meter box will still be exterior and still accessible I think. A pair of light duty wire cutters and the meter can be pulled out easily.

View doyoulikegumwood's profile


384 posts in 4167 days

#5 posted 11-12-2009 07:56 PM

have you thought of a battery backup for these cameras i think it would be best on many levels.

-- I buy tools so i can make more money,so ican buy more tools so I can work more, to make more money, so I can buy more tool, so I can work more

View ChunkyC's profile


856 posts in 3429 days

#6 posted 11-12-2009 08:27 PM

Mics – Absolutely correct. I misread the post. Bothus did state “inside,” I was thinking that he was going to add a second panel on the outside of house. Some local codes allow the service disconnect to be on the inside, california doesn’t as I remember, it’s been quite some time sense I’ve done ele. work in cali. I know our local code here in IA requires a disconnect on the outside.

However, 230.70 says that the “service disconnect” can be inside or outside, close to where the service enters the building. I had to use this clause on the last building we built this year. There is a disconnecting means at the transformer and the “Service Disconnect” is located inside at the main 480 V panel. The tansformer is too far from the building to be a service disconnect and no room at the building to add a second disconnecting means.

-- Chunk's Workshop pictures:

View GFYS's profile


711 posts in 3646 days

#7 posted 11-12-2009 08:29 PM

In any event I ‘m not sure even of the meter box available that would allow for no disconnect at the meter. I’ve not seen one.

View grizzman's profile


7836 posts in 3479 days

#8 posted 11-12-2009 08:30 PM

i think the battery back up is the best solves the problem quickly and prob with the least amount of expense…...just my 2 cents

-- GRIZZMAN ...[''''']

View Cosmicsniper's profile


2202 posts in 3334 days

#9 posted 11-12-2009 08:35 PM

I would use PoE (power over Ethernet) security cameras plugged into a network switch on a ups. This would give remote connectivity and a plethora of nice hardware recording features.

Likewise, for AC/DC powered cams and complete security systems, even the smallest UPS is all it takes to buy you plenty of time in the event of a power outage.

-- jay,

View Bothus's profile


441 posts in 3351 days

#10 posted 11-12-2009 08:51 PM

Great feedback guys. Thanks.

I will use an UPS for the security system.

I still want to install a sub panel in my attached garage. I was planning to put a 125 AMP panel there but the 1/0 wire for that was going to cost me a fortune at Home Depot. I guess I could put in a 50 AMP breaker and use 6/3 cable.

Bigger is better of course. What would you guys do? The run from the main panel is about 60’.


-- Jerry Boshear, Professional Kitchen Designer, amature woodworker.

View GFYS's profile


711 posts in 3646 days

#11 posted 11-13-2009 12:18 AM

Bothus…if the garage is attached and you are refering to 6/3 I to assume you are routing wire through the building to the sub panel? I asked an electrician and here is what he answered not knowing it was an attached garage. (I forgot to mention it)
Since 6/3 is an NM sheathed cable it’s good for 55 amps but you cannot install it inside any sort of conduit so forget that idea. What you need is obviously conduit and minimum #3 THWN for 100 amps. Disconnect and ground rods at the detached garage.

View Bothus's profile


441 posts in 3351 days

#12 posted 11-13-2009 12:33 AM

Yes. Through the building. I can run it through the attic or the crawl space under the house.


-- Jerry Boshear, Professional Kitchen Designer, amature woodworker.

View TopamaxSurvivor's profile


18380 posts in 3851 days

#13 posted 11-13-2009 02:26 AM

FYI, all service disconnects have to be at one location per national electrical code. UPS is the way to keep the cameras on. A big dog is the best security system ;-))

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View drfixit's profile


318 posts in 3319 days

#14 posted 11-13-2009 02:30 AM

I have a large UPS system for my camera system, but instead of the battery it had inside. I ran some heavy 10 gauge wire out of the UPS to a large deep cycle marine battery, much longer run time.

-- I GIVE UP!!!! I've cut this @!&*!% board 3 times.... its still too short!

View interpim's profile


1170 posts in 3634 days

#15 posted 11-13-2009 02:44 AM

I have the best home security method ever created… follow these easy steps and you to can have the security you desire.

1. Place a pair of size 14 boots on your porch, and a copy of “Guns and Ammo”

2. Put a note on the front door that reads as follows.


I went to the store to get more beer and ammo. Wait until I get back though because Kujo, Killer, and Clyde got ahold of the mail-man earlier. I think Kujo is ok, but there was a lot of blood so I am not sure yet. I should be back soon, so just hang out in your truck.

signed, Cletus

3. Get a simple motion detector and hook it up to a recording of dogs barking.

That’s it… You’ll never have any problems.

-- San Diego, CA

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