What size transformer do I need?

raljanSeptember 11, 2012

I have a Morris 70332 24V 2A door jamb ball switch and need to get a transformer. What specs do I look for?

Thanks.

Thank you for reporting this comment. Undo
kurto

You need to match the transformer to the bell or chime, not to the switch. Most doorbells are 24Volts, but some require a bit more current than others.

    Bookmark   September 11, 2012 at 7:20PM
Thank you for reporting this comment. Undo
bus_driver

Most door chimes are 16 volts. Older (much older) chimes might be 10 volts.

    Bookmark   September 11, 2012 at 10:00PM
Thank you for reporting this comment. Undo
alan_s_thefirst

What are you planning to use this for? It's not a doorbell switch. Is it for an alarm system, or just a visitor announce thing?

    Bookmark   September 12, 2012 at 2:58PM
Thank you for reporting this comment. Undo
alan_s_thefirst

Keep in mind if you plan to connect a doorbell to that switch unmodified, it may overheat. Most are not rated for constant use, but as long as the door is open, a "dingdong" doorbell will be energised. You'll hear "ding" but no "dong" until the door closes.

I learned this the hard way, it melted the doorbell a bit. My solution was to connect the bell to a relay, on the normally closed terminals. When the circuit was energised, the relay would open so the chime was really a pulse- very quick, but it was perfect.

    Bookmark   September 12, 2012 at 10:58PM
Sign Up to comment
More Discussions
Swimming pool wiring
I have 2 gfci circuits operating two pool pumps. Is...
dalemd88
Bath fan/light combo
Attached is wiring diagram of masterbath (I hope I...
jaspol
Two fans on same circuit in different rooms, can't get wiring right
So here's the situation. I have two ceiling fan/lights...
jenfarino
Code changes
In outlining the electrical layout for our new home,...
mtvhike
Goodbye Phone Jack: what to do with wires?
We want to remove this phone jack. It's in a useless...
maggiepatty
Sponsored Products
Serena & Lily Hanna Andersson Baby Sleeper
Serena & Lily
Sonax Willow 6-drawer Dresser
Overstock.com
Kichler Lilah Traditional Wall Sconce
1800Lighting
Artisan Desk
| Dot & Bo
Yipes Stripes´┐Ż Rectangular: 5 Ft. 4 In. x 7 Ft. 8 In. Kid Essentials - Active Pl
$335.95 | Bellacor
MURO Perforated Magnet Board by Blomus
$44.09 | Lumens
Filament Design Lamps Catherine 1 Light Halogen Black Stereo Light
$96.00 | Home Depot
A C Pacific Kayden Blue Power Chair - KAYDEN ACORN POWER CHAIR
$709.99 | Hayneedle
© 2015 Houzz Inc. Houzz® The new way to design your home™