Compensation payable for disability from an occupational disease must be the same as that provided for an injury under this title. No compensation is payable:
(1) for the degree of disability resulting from noncompensable causes or the employee's refusal to use a safety appliance provided by and regularly required to be used by the employer or to obey a safety rule or regulation adopted and regularly enforced by the employer;
(2) for any disability resulting from the employee's intoxication or wilful intent to injure himself;
(3) for the time the employee refuses to accept suitable employment when ordered to do so by the commission;
(4) after the disability terminates.