While looking for something else I came across this:
Enclosed Pre-Wired Relay
https://www.ebay.com/itm/RIB-Functional-Devices-RIBU2C-Enclo
sed-Pre-Wired-Relay-120-277VAC-10A/282946266423?epid=3D2261035
387&hash=3Ditem41e0e96537%3Ag%3AkTIAAOSwqxRa52aB&_sacat=3D0&_nkw
=3Denclosed+pre-wired+relay&_from=3DR40&rt=3Dnc&LH_TitleDesc=3D0

Use the 555 module to switch this one as Russell suggests.

Allen

-----Original Message-----
From: piclist-bounces@mit.edu
[mailto:piclist-bounces@mit.edu] On Behalf Of RussellMc
Sent: Thursday, July 19, 2018 5:38 PM
To: Microcontroller discussion list - Public.
Subject: Re: [EE] Is this safe?

Using the module to control a relay of your choice would
give you control
of the isolation.

Note that many of the '5v-control to SPDT or DPDT mains
contacts" relay
modules sold for use with eg Arduinos use relays which have
impressive PCB
isolation distances between the coil contacts and two of the
3 terminals of
their SPDT switches BUT locate the centre contact adjacent
to the coil
contacts.


Russell
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list
archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.