{
    "variants": {
        "normal": { "model": "cadium_block" }
    }
}

You forgot modid.

{
    "variants": {
        "normal": { "essentialelectricity": "model/cadium_block" }
    }
}

?

No the way I told you, but instead of "inventory" use "normal"

Im really new to coding minecraft mods im so sorry this is the only problem i have

{
    "variants": {
        "normal": { "essentialelectricity:model": "cadium_block" }
    }
}

"normal": {"model": "modid:model_name"}

THANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOU You dont even understand how long iver been trying to fix this THANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOUTHANK YOU THANK YOU Dude omfg im hyped now

I love how Animefan had to tell you the same thing four times.