Which Relay To Get - Basic Electrical Question (For People Who Know Electricity)

[2009MobiusLSV]

Long story short I'd like feedback/guidance on relay selection. The relays will be used to operate reversible ballast pumps.

12v pump, stated draw is 11.5 amps. Its on a 20 amp circuit breaker.

The relay needs to be waterproof/marine grade, continuous duty and handle 20 amp start up surge.

https://www.amazon.com/dp/B07XC6KHD3/ref=emc_b_5_i?th=1

This appears to fit the bill, would it work well?

Do I need something heavier duty?

Any other suggestions for relay?

[z28ke]

That should work just fine for your application wired as a positive trigger.

I assume you’ll use the 20 amp breaker feed you mentioned as the main power to the relay (30 in the diagram), if not be sure to add an inline fuse there.

https://uploads.tapatalk-cdn.com/20200709/e2cffc02e52dd27321f1ca646253df34.jpg

[z28ke]

How many pumps are you wiring?

Wakemakers makes a reversible pump harness that I’ve used in the past for simplicities sake along with their ballast timers. Doesn’t look like theirs even uses a relay, so I assume the included switch can handle the amp draw.

If your budget allows this would be the easiest route:


https://www.wakemakers.com/premium-reversible-pump-wiring-harness.html

[2009MobiusLSV]

3 pumps total. And am hoping to reuse the 3 existing switches and save some cash. If it doesnt work ill rewire or get the wake makers harness.

Thanks for the help.

[z28ke]

3 pumps total. And am hoping to reuse the 3 existing switches and save some cash. If it doesnt work ill rewire or get the wake makers harness.

Thanks for the help.

Here’s a couple wiring diagrams I found that might help:


https://uploads.tapatalk-cdn.com/20200713/eaa19459027a5dbb86effddac22337da.jpg

https://uploads.tapatalk-cdn.com/20200713/fcfb3327e1ac4d995c45153eafd6fa69.jpg

[ZoeSanderson]

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[bteeter]

You need a dpdt if you have reversible pumps