Controlling active speakers with WiFi Sonoff switch

[mpofu]

So in my local community centre, some active speakers have been wired into switched fused spurs (the IEC cable has been integrated into the spur). The only problem is, they are 4 metres high and are used for a few hours a week which means the switches have to be flicked with a long rod every time to turn them on/off. (The speakers are EV's which have overheating issues, hence why they are turned off after use).

I want to be able to control them remotely without having to touch the wiring behind the wall. I came up with this and want some advice before I apply to the speakers.

1. Switched spur has an integrated IEC cable (currently connected to the active speakers)
2. IEC cable (Male end) will be connected to IEC extension cable (Female end)
3. In the middle of the IEC extension cable will be a Sonoff switch
4. Blue and Brown will be routed through the Sonoff switch
5. Earth will not be routed through thr Sonoff as it does not support earth
6. Earth will be left as it is (not tampered)
7. IEC cable (Male end) will plug into the active speaker

https://ibb.co/dc6Oib

I can't see any issue but can anyone knowledgeable with electric confirm is the Sonoff 10amp switch this is appropriate for 800W/230v speakers with 0.4A at 1/8th power?

 

[lucid]

Yes. You'll be fine. The clue is in the current rating. The speaker draws 0.4A at 1/8th power rating. So, 0.4 x 8 = current draw at full power = 3.2A.

The Sonoff can supply a switching load of 10A. That's over three times the capacity. IOW, you could connect two of the Electro Voice speakers to 1 Sonoff switch and still be comfortably inside the 10A supply limit.

Since this is a public space my guess is you'll need to get a spark in to do the actual wiring. That's not because it's difficult, because it's not. It's to stay compliant with the regs and insurance.

 

[jpaul]

I had posted about concerning Sonoff standby current - have not searched recently for any new data

Thanks, yes I guess is depends on the firmware, whether its is putting it into DTIM3,
but even that spec p12 says during wireless transmit
Maybe some of the alternative firmware, addresses such concerns eg putting it into deeper sleep at time when you do not want fast response,
if it gave me 60s poll for turning on my coffee amchine that would be fine.

EDIT: subequently saw another article w/custom firmware suggesting default 0.6/0.7W but could be reduced , i am amazed the info is not readily available
seems to be a new 4 channel version too, cheaper than 4 singles
EDIT2: 4channel uses a newer chip esp8285 with internal flash

 

[lucid]

If you're preoccupied by the standby power consumption then either calculate the annual running cost - lots of on-line calculators for that - then weigh up cost vs convenience; or have the spark install either a pull cord switch with neon or a 7 day timer. Or you could just stick to the pole. Pros and cons for each. Convenience has a price though.