[Amps] OT - Mercury relay question

[Gary Smith]

Apologies for asking here but I need to 
know something & figure some here know the 
answer.

I need a single pole 24V NC 100 amp 
mercury relay, a 100NC-24D is ideal. I 
haven't found a NOS/used one since I've 
been looking.

I do find 3 pole 24V 35A mercury and 
wonder if I tie the three poles together 
to act as one, would that effectively act 
as a 105A relay? My doubt comes from 
perhaps a lag between one pole and the 
other two being problematic and making 
this a poor option. 

It will be used in tying solar panels 
together with a secondary charging source 
to supply an 3000W inverter & charge 
batteries.

Thanks & 73,

Gary
KA1J